Yongnuo 1 x YN-622N-TX + 2 x YN-622N RX i-TTL LCD Wireless Flash Controller Wireless Flash Trigger Transceiver For Nikon D70 D70S D80 D90 D200 camera LCD screen display, multi-buttons quick operation,The firmware can be upgraded through the USB interface Support wireless shutter release function,The focal length(zoom)of the A/B/C three groups of flash can be adjusted separately Grouping flash mode: i-TTL/Manual flash/Super sync Supporting mixed use of the A/B/C three groups of flashes with i-TTL, Manual flash, or Super sync flash mode Shutter Sync: first curtain sync, second curtain sync and FP high-speed sync, the highest sync speed is 1/8000s