Dear strobists! I’m posting a fresh review-test of the Pixel King radio synchronizer for Nikon (thanks to Andrey Revun from Ternopil), who provided tests for the D300s+SB900+King combination.
Overall, King exceeded expectations - it works 1/8000s on studio and on-camera lighting, TLL pass-through on the transmitter hot shoe WORKS, TTL support on flashes, EV correction, etc. Below is a quote from the article, full text on the blog
P.S. If you want to ask a question and have the author of the test answer it, ask it on the blog.

Build quality and design

The first impression when opening the box - Oh, these really look like good devices!

Indeed, the kit includes a transmitter and receiver that inspire confidence. True, the “boxes” are quite large in size, but they are pleasant to take in your hand and you immediately want to put them on the camera.

Ergonomic design, convenient location of controls. A small detail (but a pleasant one!) that immediately caught my eye was the Off/On lever. When you put the synchronizers in the case, the power button will always tend towards Off, that is, even if you somehow touch it, there will be no such annoyance when the power switch miraculously turns out to be in the On position and the batteries are at zero. I was glad that they took this into account)))

The case is very well made, everything fits together exactly, the LEDs fit tightly, the power switch is very good (doesn’t wobble or is not too soft so that it can switch spontaneously), nice channel and group selection buttons.
Everything is made of durable plastic, it’s not scary to put a flash on the receiver, and this structure is on a stand, stretched over the “abyss”, a very reliable mount.

By the way, another useful little thing: in the mount of the receiver and transmitter there is a spring-loaded pin (pin), so the reliability of fastening to the holder is at a decent level!

The synchronizer operating frequency is 2.4 GHz. The operating range is even slightly larger than the stated 100 m. But the operating range most likely depends on the environment (you need to take into account the specifics of radio and electromagnetic interference).

I was also very pleased with the fact that it is powered by ordinary 1.5V AA batteries (2 AA batteries each), because CR-2 batteries are not particularly invigorating in terms of price and life expectancy

There is also a USB port for changing firmware, but I haven’t connected it to a computer yet - there’s no need.

Overall, I really enjoyed it. But there are some “Buts”

How to turn on the Pixel King Nikon radio synchronizer

Now I’m writing specifically about MY combination D300s+SB-900+ Pixel King for Nikon.
It is very important to connect everything in series, because my first connection was very disappointing. In the off state, you need to screw everything onto the camera and flashes, turn on the power on the receivers, turn on the power on the transmitter, then turn on the flashes, then the camera, then the expected TTL (TTL FP))) will appear on the control display of the flashes.

If the order is incorrect, the elements of the circuit are poorly recognized - the TTL (TTL FP) mode does not appear on the flash, but the indication of operating mode A simply lights up, which means its operation is absolutely inadequate (either the camera or the flash is detected incorrectly, it’s not clear...).

Review of radio synchronizers for CANON with support for E-TTL and HSS Pixel King and Yongnuo-622c

These synchronizers are direct competitors in terms of price and functions, in terms of the ratio of features and price; perhaps these are the best synchronizers on the market in their category at the moment.

Why are they great? They support almost all the functions that are transferred from the camera to the flash and even more! This means we can use a flash taken from a CANON camera as if it were installed on it!

How are they better than cheaper radio synchronizers? For example, Yongnuo RF-602, Yongnuo RF-603-II, which have long become popular among amateur photographers and some professionals, could only transmit a signal to fire the flash and wake it up, and also be used as a remote device for releasing the shutter, so little functionality over time began to irritate those who use on-camera flashes on stands (often with an umbrella or softbox), since in order to set up the flashes they had to run up to the stands many times, lower them and adjust the pulse strength on the flashes; in addition, it was impossible to use a shutter speed shorter than 1/ 160 (with other similar synchronizers no shorter than 1/200-1/250).

New synchronizers allow you to do everything remotely; previously this was only available to expensive synchronizers like Pocket Wizard. Without going near the flash, we can switch it to the mode we need and configure it directly from the camera menu, for example, switch to manual mode and set the flash strength, or set the flash exposure compensation in automatic mode and calmly shoot almost without thinking about setting the flash, but simply moving it to obtain the desired light and shadow pattern. In addition, we can now enable high-speed sync (HSS) mode and shoot at the fastest possible shutter speeds up to 1/8000 - a delight for lovers of an open aperture during the day!!

It also looks interesting that the new (compared to the same YN RF-602) synchronizers now use batteries or accumulators of AA format, and not AAA as before, this is somewhat more convenient, since the same battery format is used for the flash, but the size has increased transmitter and receiver and their weight, especially taking into account batteries.

We can switch the flash firing to the first curtain, the second curtain or a strobe (for the Speedlite EX 580 II and not with the Pixel King), set flash exposure compensation bracketing (in the test this function refused to work with the Pixel King), set the flash zoom to the desired angle ( manually or automatically).

Not only that - we can work with three groups of flashes, turning on and adjusting the ones we need (only the YN-622 works correctly with group ratios so far) or turning them off.

The synchronizers have autofocus illumination! Now you can safely focus in complete darkness, both in the studio and on the street. On synchronizers it is possible to make a test pulse; to do this, press CH SET and GP SET simultaneously on the Pixel King (all flashes will fire) or the test button on the YN-622.

Since there are significant differences, we will continue further about what is different about them:

The appearance of the Pixel King is very decent and the assembly of the device seems to be of higher quality, unlike the YN-622, when you look at it, you think that their designer was on vacation during the creation of this device, the glossy surface of the YN-622 case on top instantly scratches - they don’t skimp on the Pixel King case that much.
Further, the very convenient “through shoe” function, which allows you to install a flash on the synchronizer transmitter, works only on the YN-622; on the Pixel King, it is apparently intended for other purposes (the kit even includes a plastic plug for the “shoe” socket). Also, the Pixel King does not shine with its strobe mode (present in the 580EX II); it is simply not installed in the camera settings, unlike the YN-622.

The Pixel King's equipment is very good: the transmitter and receiver themselves, two cables for studio flashes and a USB cable, straps, a stand similar to a stand from a Canon flash, a plug, instructions and a chic case with a belt clip for the whole thing. In addition to two transceivers, the YN-622 (I must say the transceiver is a somewhat more convenient solution than a separate transmitter and receiver in case one device comes out of several) only comes with instructions; it’s a pity that the YN-622 is not equipped with an adapter for studio flashes, however, the connector on both synchronizers is standard and the cord that comes with the studio flashes should be suitable.

Perhaps it will seem important to someone that the real “range” of the Pixel King is about 150 meters (up to 100 meters are stated), in contrast to the 50 meters of the YN-622 (at least in my test it turned out that way, measured on Google maps). Why is such a response range (150 meters) needed? For example, when shooting with a super telephoto lens or indirect visibility to the receiver.

Less significant is that the autofocus illumination differs in the shape of the beam, the Pixel King has a spot similar to the spot from a portable flashlight, and the Yongnuo-622 has a set of lines in two planes occupying a smaller area, in both cases all the autofocus points of the camera will not be covered by such illumination, It should be noted that synchronizers from both companies can be used for illumination at the central autofocus point if you want to shoot in low light without a flash (flash can be simply annoying due to its size and weight when you don’t use it, but you don’t take pictures from the camera because you want autofocus illumination).

The ability to update the firmware and power the synchronizer from an external power source is not available on the Yongnuo-622, but is available on the Pixel King via a mini-USB connector.

The Pixel King receiver has a plastic hot shoe connector, which is not at all great, given the usual mounts on stands with umbrellas or softboxes, although in the center there is a metal sleeve with a thread for a tripod screw, while the Pixel King transmitter has a metal hot shoe connector.

Yongnuo-622 does not have such oddities; both devices have a metal connector (the devices are basically identical). What's nice is that the Pixel King and Yongnuo-622 have plastic thumb-clips on the hot shoe connector for mounting in the socket.

Additional notes on these synchronizers:

Not all Canon DSLRs and flash units support the described functions of these radio synchronizers!
The cameras listed below support flash control functions from the camera menu and will work with these flash triggers.
1D Mark III, 1D Mark IV, 1Ds Mark III
5D Mark II, 5D Mark III
7D
40D, 50D, 60D
450D, 500D, 550D, 600D, 650D
1000D, 1100D

Flashes that support control from the camera menu and will work properly with “our” synchronizers -
Yongnuo YN-568EX, YN-565EX, YN468, YN468-II, YN467, YN467-II, YN465
Canon 600EX, 600EX-RT, 580EX II, 430EX II, 320EX, 270EX II

But what about the older flashes 580EX I, 430EX I, of which people have accumulated an incredible amount? The TTL mode will work (it will work itself, without running around), exposure compensation, exposure compensation bracketing (only for the YN-622), HSS (which is good), as well as turning off the flash (the flashes are turned off, and the autofocus illuminator on the transmitter will work ), well, group management won’t go away either (at least disable, connect the group).

The Pixel King and Yongnuo-622 kits do not include an adapter for the remote control function; it must be purchased separately.

Conclusions and distinctive features briefly:

Pixel King and Yongnuo-622 are devices long-awaited by many photographers, which allow you to fire studio flashes, remotely trigger the shutter release, and also comfortably shoot using groups of on-camera flashes at a considerable distance, without the need to approach and adjust them every time you change their position, having transfer of HSS functions (and to special studio flashes too) and the ability to shoot at shutter speeds up to 1/8000, as well as autofocus illumination and all this for reasonable money.

Pixel King radio synchronizers look better, have a “range” 3 times greater than Yongnuo-622, are re-readable as standard (which gives some hope for improved functionality), have a rich set of components and a threaded hole on the receiver for attaching to a tripod or stand.

Yongnuo-622 radio synchronizers support the functions of “through shoe”, exposure compensation bracketing, strobe, works correctly with group ratios, both devices include a metal connector on the “hot shoe”, and are a transceiver.

You can buy synchronizers in our online store:
Yongnuo-622 Canon

Review prepared by: Alexander Kuzin

The professional Pixel King PRO synchronizer for Nikon belongs to the third generation of Pixel TTL radio synchronizers. Can work with both on-camera flashes in TTL/i-TTL or manual mode, and with studio flashes. The Pixel King PRO transmitter for Nikon has a hot shoe with a clamping ring for attaching the transmitter to the camera, as well as a mini-USB port for firmware updates or power connections. The LCD display allows you to visually monitor all current settings and quickly reconfigure the synchronizer. The Pixel King PRO radio synchronizer can simultaneously control one, two or three groups of flashes in TTL or manual mode, while power, exposure compensation and zoom can be adjusted separately for each group. Flash control is supported using the camera menu. The selection of working channels and the distribution of flashes into groups is carried out using buttons, each of which has a light indicator.
The Pixel King PRO synchronizer receiver has the following interfaces: a mini-USB port for updating the firmware and connecting power (5 V), a 3.5 mm PC output for connecting an off-camera flash or a studio flash, a hot shoe for installing on an on-camera flash receiver. The bottom of the receiver has a standard thread for a tripod. Using a clamping ring, the receiver can be mounted on a flash stand or in a studio holder.
An advantage for photographers is that the Pixel King PRO is fully TTL compatible with previous generation Nikon Pixel King receivers.

Characteristics:
Range - 300 m
Number of channels - 16
Signal frequency - 2.4 MHz
Supports FP HSS high-speed sync - up to 1/8000 sec
Ability to control and change flash parameters through the transmitter menu,
Possibility of simultaneous use and control of flashes in different modes - iTTL, manual (Manual),
Possibility of making correction (FEC) +/- EV power ratio in groups A:B and A:B C,
Ability to set individual light head position values ​​(zoom) for each group,
Set FEC compensation values ​​in +/- 5 steps,
Pass-through transmitter hot shoe,
Supports second curtain flash firing,
FEL support,
Possibility of flashing internal software. Availability of a USB port, works on both Windows and Mac,
The Pixel King Pro transmitter can be both a receiver and a transmitter - a transceiver,
Support remote shutter function.

Currently, we can confidently say that the Pixel King Pro radio synchronizer for Nikon is fully compatible with flashes such as Nikon SB-900, SB-910, SB-800, Metz 44AF-1/N, Metz 50AF-1/N, Metz 52AF-1 /N, Metz 58AF-2/N, Oloong 551EX, Oloong SP-690 (limited), Oloong SP-690II (limited), Yongnuo YN-468 II for Nikon (limited), Yongnuo YN-467 II for Nikon (limited) .

Equipment:
Radio synchronizer - 1 pc.

• Review. Pixel King radio synchronizer for Canon

  Pixel produces a range of radio triggers and controllers for Canon cameras.
  Radio synchronizer for Canon Pixel King E-TTL, which will be discussed in this review, is designed to control remote flashes through the Canon camera menu using a radio channel.
  In 2007, with the release of the EOS 1D Mk III and 40D digital cameras, Canon introduced the FCM (Flash Control Menus) camera control system. King radio synchronizer provides all the benefits of radio communication when using FCM and Canon Mark II Speedlite flashes.
  This review tests a kit released in August 2011. Further updates by the Pixel manufacturer are not ruled out.

  Also participating in the test are: 50D, one 580EXII flash, three 550EX and two 430EXII.

  Contents of the review of the Pixel King radio synchronizer:

  Characteristics of Pixel King

  Delivery kit for Pixel King radio synchronizer
  

  Item	Description
  Case for Pixel	Lasting; Includes mini stand and instructions
  King transmitter (TX)
  King receiver (RX)	In a secure separate compartment, there is a safety strap
  Connecting Cord (PC-1/4)	Cable with PC connector 6.5 mm (“big jack”)
  Connection cord (PC-3.5)	Cable with PC connector to 3.5 mm (“small jack”)
  USB 2.0 cable	Connector A male to Mini B male, length 1.5 m.
  Receiver plug	Plastic plug for receiver hot shoe when used via PC cable
  Mini stand	A versatile Pixel stand with a wide base and ¼" threaded hole for stand mounting.
  Instructions for using King	Version V10.01

  External interfaces

  

  Location	Item	Function
  Above	Logo	“Pixel King ETTL Flash Trigger” with “Transmitter” or “Receiver”.
  	Hot shoe	The hot shoe on the transmitter does not allow for mounting a flash - only for additional accessories Pixel, RX: full E-TTL support over the radio channel
  	3 indicators	Channel setup - L1, L2, L3
  	3 indicators	Group setting - A, B, C
  	Indicator	Communication indicator
  Front	AF illuminator	TX: Red AF illuminator, RX: White AF illuminator
  Behind	Indicator	Communication indicator
  	"Ear"	To attach a safety lanyard
  Left	Button	Channel selection
  	PC connector	TX: no assignment yet, RX: PC output
  	mini-USB connector	To update the software, the receiver supports the radio remote control function (with an optional lanyard)
  On right	Button	Group selection
  	Switch	Turning on/off the radio synchronizer
  From below	Hot or cold shoe	TX: Hot shoe with a tightening ring for attaching to the camera is the only way to attach the transmitter Pixel King,RX: Cold shoe with a convenient tightening ring and 1/4 thread for attaching to a stand
  	Lid	Battery compartment

  Radio synchronizer dimensions

  Wireless system

  Control channels

  You can set the channel on the transmitter or through the camera menu.
  The following combinations are available:

  CH button

  L1

  L2

  L3

  L2 L3

  L1 L2

  L1 L3

  L1 L2 L3

  Each receiver can be set to 1 channel. Accordingly, only those receivers whose channel matches the channel on the TX transmitter or the channel that is set through the camera menu will work. Any channel indicators on the flash LCD are ignored.

  Receiver Shoe Voltage

  According to the manufacturer's information, the voltage at the receiver shoe is 60 Volts, i.e. it is not compatible with higher voltage flashes (aka high voltage flashes)
  

  Compatible with EOS Canon cameras

  Flash Compatibility

  

  Control	Functions	Manufacturer	Camera models
  Via camera menu (FCM)	E-TTL, exposure compensation, HSS sync, curtain sync, channels, groups, zoom, ETTL mode, sync speed 1/8000s	Canon	580EX II, 430EX II, 270EX
  		Third Party Manufacturers	Metz AF-48, 50, 56
  Camera buttons	Exposure compensation, HSS high-speed sync, manual mode M	Canon	580EX, 430EX (550EX not compatible yet)
  		Third Party Manufacturers	Yongnuo YN-565EX, without HSS
  Flash buttons	Manual control	Various on-camera; budget studio	Synchronization speed up to 1/250 s)
  		Original studio flashes	Sync speed up to 1/8000s, limited only by camera or flash capabilities

  Build quality and design

  The sleek body of the radio synchronizer is designed with excellent ergonomics - all controls are easily accessible (including the on/off button!), and indicators can be viewed from a distance. The product is made with special attention to detail and allows the photographer to quickly change the necessary settings.
  Some design innovations are an external power supply, the use of NiZn batteries; more secure attachment of the receiver's leg. The following problematic issues have also been fixed - the battery compartment cover now closes more securely, the receiver leg now has a large diameter ring with cutouts for nails (with care for the ladies :)), as well as a thread for mounting on a tripod with a diameter of 1/4 inch.
  

  Flash power control

  Control via camera menu

  Most features Pixel King for Canon Based on the Canon camera menu control system. It requires a 1D Mk III, 40D, or later camera and a Mark II Speedlite. Menu functions vary depending on the camera model.
  What's notable is that Pixel King changes some menu options, disabling some and leaving others on.
  For example, this is how a radio synchronizer works with a Canon 50D

  For convenience, add the “Flash Control” menu item to your Custom Menu and set it to open first.

  ETTL with FEC Flash Exposure Compensation

  Automatically adjustable pulse power
  This mode is available when using an EOS camera with Speedlites EX (except 550EX for now) mounted on the RX receiver shoe in slave mode.
  You can group flashes into one group (A+B+C) either A:B or A:B, C is not supported. FEC can be applied by pressing the FEC button on the camera, through the Quick Settings screen, or the camera's control menu. Multiple flash control available at the same time

  Remote control in manual mode

  This Pixel King mode is available for DSLR cameras with Mark II flashes on the RX receiver shoe. Flashes can operate in one group (A + B + C), two or three, each group with its own power level. The power level varies from 1/1 to 1/128 for each of the three flash groups and is set via the camera menu. Individual groups can be activated or disabled using the GP button on the TX Pixel King transmitter.

  Manual flash mode

  Control the power level directly on the flash.
  Assumes using an EOS digital camera with flash in manual mode. You must connect the flash to the RX radio synchronizer receiver using a PC-sync cable. In this case, Pixel King provides a simple trigger function.
  The second way is with an EOS camera and an EX Speedlite mounted on the hot shoe of the RX receiver, but set to Manual M after it is detected by the receiver.

  Mixed mode ETTL / Manual

  Flash power control in mixed ETTL and manual modes
  Control through the Canon camera menu allows you to use either E-TTL or M mode, but not at the same time.
  However, you can use E-TTL mode and manual mode from the flash directly. The trick is to use E-TTL directly to shoot the subject, and use manual flash for the background, hair, etc. ETTL pre-meters the exposure and then all flashes fire simultaneously.
  

  Shutter Timing Modes

  First curtain sync

  First curtain sync is available in both E-TTL and manual modes. It involves simple synchronized flash firing with manually set output.

  Second curtain sync

  Second curtain (rear curtain) sync works in E-TTL mode (groups A + B + C) or manual mode.

  High Speed ​​Sync (HSS)

  High-speed sync up to 1/8000s is available if supported by camera and lighting equipment. This is the standard synchronization mode.
  Radio synchronizer for Canon switches between normal speed at long shutter speeds and HSS at shorter shutter speeds. Full flash output is only allowed at lower speeds. The optimized HSS is 1.5 stops slower. If the shutter is set to high speed and first curtain sync is enabled, the shutter will be forced to switch to normal flash sync mode.

  Hypersync

  Pixel may not use this term (as it is a trademark registered with PocketWizard), but it is nonetheless an optimized "hypersync" feature that works for most on-camera flashes and studio flashes. The Pixel King can fire studio flashes that support 1/8000 sync speeds using the PC-sync connector.

  Multi Mode (Strobe Mode)

  Strobe Multi mode is not available.

  Other camera features

  Flash exposure lock (FE Lock)

  The Pixel King's RF sensor fully supports Canon's AE lock feature. When you press the FEL button on the TX transmitter, the blue LED will flash every second for 16 seconds.

  Autofocus support (Auto-Focus Assist)

  The TX transmitter has a white autofocus that lights up when you press the shutter button. This is not a Canon original feature, so the backlight may be too bright in low light conditions.
  Autofocus on flashes also works when this is installed on the camera.

  Remote camera release

  RX receivers can be connected to the camera socket with a special USB Mini B to E3 or N3 cable adapter (optional).

  Canon E-TTL wireless sync

  This function is not supported, including Master/Slave and E-TTL. "IR", popular, but
  The incorrect term for Canon's wireless control lights is not used. However, wireless control mode must be activated in the camera menu to be able to access some manual settings.
  Warning - If "Main Flash" was previously set to "Disabled", Pixel King will not turn on.

  Modeling light

  The modeling light function is not available.

  Bracketing (FEB)

  The Bracketing function is not available.

  Wake-up function

  The TX radio trigger also goes into a power-saving sleep mode when the camera goes into sleep mode, but it wakes up almost after half-pressing the shutter button or FEL button.

  Other flash functions

  LCD indicators

  Flash zoom, focal length, ISO, shutter speed, FE Lock and HSS - all indicators change instantly in real time either when changed in the camera or when the shutter button is half pressed

  Pilot test indicator

  On any flash, you can perform a test release using the Test button.

  Zoom settings

  The camera control menu will set the zoom reading automatically to the same value - be it automatic or manual mode. If the flash head is set to the fail position, camera control will be disabled and any flash zoom settings will be retained.

  Other Pixel King Features

  Information indicator

  The TX transmitter emits a short red signal when powering up/initializing, and a blue signal when transmitting data. There is no signal for the “standby” or “sleep” state.
  The RX radio synchronizer receiver emits a short red signal when turned on and a blue signal when receiving data. In standby mode, it blinks at a frequency of 2Hz. After contact with the camera, the blue signal disappears and within 30 seconds the processor is ready to receive data in operating mode.

  Using a flash meter

  You can fire all flashes in test mode, regardless of the group, by simultaneously pressing the CH and GP buttons on the transmitter.

  External power supply

  The battery compartment on the transmitter is very accessible, unlike the receiver. You can use a battery pack with a USB connector (See 9. Problems below.).
  

  Software update

  Software (firmware) updates for Pixel King are available through their website:
  http://pixelhk.com/down/king/
  You will also need a RAR archiver to extract the archive.

  Selecting and downloading the necessary archives

  The following firmwares are currently available for Canon kits

  Read the firmware update instructions

  Upgrade instructions can be viewed using the button in the lower right corner of the updater.

  Extracting a folder with files to the desired directory

  Extract the RAR file using the latest rarLab, WinZip, etc. for your OS. It contains a folder with 3 files - *.bin, Pixel Upgrade Tool.exe and wtf.fir

  Attach the Pixel King Receiver or Transmitter

  Select the appropriate radio synchronizer device to update, turn it off and disconnect its shoe.
  Connect the King to your computer using the included USB 2.0 cable (suspect quality) or a Canon USB cable (good quality).
  The updater should accept the device and the transmitter's AF light should light up (the other 7 lights should be off).

  Launching the update

  Make sure that the updater shows the correct firmware version and click the “Upgrade” button. Turn off the radio synchronizer and disconnect it from the computer.
  

  Conclusions about the Pixel King radio synchronizer for Canon

  Supporting camera menu control is a major advancement in the on-camera flash industry, and Pixel has done an impressive job of integrating data transfer between remote flashes over the air.
  Pixel has achieved such things in King radio synchronizers as -
  
  Flash Sync
  E-TTL transfer and start one group
  Remote manual control and launch of one to three groups
  Synchronizing modern studio flashes

  Pixel King is a completely serious product aimed at a wide audience of photographers who, in dynamic shooting conditions, do not want to sacrifice automatic power adjustment, hss and control through the camera menu.

  Taking into account the positive reviews (see bottom of the page) from Pixel King users, this is another contender for PocektWizard - let’s see how long it can keep the level of top TTL radio synchronizers for Canon among Chinese manufacturers.
  

  Pixel King radio synchronizer instructions for Canon

  Pixel King Manual in PDF format in Russian with a detailed explanation of the operation and functions of the radio synchronizer can be downloaded from this link.
  
  Video review of the Pixel King E-TTL radio synchronizer for Canon

  The professional Pixel King PRO synchronizer for Nikon belongs to the third generation of Pixel TTL radio synchronizers. Can work with both on-camera flashes in TTL/i-TTL or manual mode, and with studio flashes. The Pixel King PRO transmitter for Nikon has a hot shoe with a clamping ring for attaching the transmitter to the camera, as well as a mini-USB port for firmware updates or power connections. The LCD display allows you to visually monitor all current settings and quickly reconfigure the synchronizer. The Pixel King PRO radio synchronizer can simultaneously control one, two or three groups of flashes in TTL or manual mode, while power, exposure compensation and zoom can be adjusted separately for each group. Flash control is supported using the camera menu. The selection of working channels and the distribution of flashes into groups is carried out using buttons, each of which has a light indicator.
  The Pixel King PRO synchronizer receiver has the following interfaces: a mini-USB port for updating the firmware and connecting power (5 V), a 3.5 mm PC output for connecting an off-camera flash or a studio flash, a hot shoe for installing on an on-camera flash receiver. The bottom of the receiver has a standard thread for a tripod. Using a clamping ring, the receiver can be mounted on a flash stand or in a studio holder.
  An advantage for photographers is that the Pixel King PRO is fully TTL compatible with previous generation Nikon Pixel King receivers.