Yongnuo RF-603NII-N1 Wireless Flash Trigger Kit for Nikon D700 D800 D5600 D5500 D3400 D3500 D810 D610 D600 D800 D7500 D7200. Yongnuo RF-603NII-N1 Wireless Flash Trigger Kit for Nikon. It can be set to single transmit state (TX), which will be more convenient for testing flash, and can be set to transceiver state (TRX), automatically switch transmit and receive state, adopts 2 levers button design, it will realize the awakening, flash testing, focus and shutter function in "TX" and "TRX" state respectively.
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