YONGNUO YN685 N GN60 2.4G System i-TTL HSS Wireless Flash Speedlite with Radio Slave for Nikon Wireless SystemFully Compatible with YN622N and RF603 Wireless Flash System Remote ControlSupports Remote Control the Parameters of Each Flash Group Extended DisplayUsed as YN622N II control panel and LCD panel HSSSupports High-speed Synchronization High Guide NumberGN60@ISO100,200mm