YN685EX-RF On-camera Flash Light Master Slave Speedlite GN60 TTL 1/8000s HSS 2s Recycle Time with 2.4G Wireless Trigger System Replacement for Sony A7 Series A6600 A6500 A6400 A99 A77

Built-in 2.4G Wireless Trigger SystemCan work as a master or a slave unit, and fully compatible with RF radio triggering signals from other YONGNUO' speedlite, Supports Multi-group Flashes Independent ControlWhen as a master unit, the camera flash is able to control 5 independent groups to realize remote control of flash mode, Supports Optical Transmission Wireless Slave FlashIn optical transmission wireless flashing mode, YN685EX-RF can be set as a slave unit to receive optical transmission wireless triggering signals from YN320EX or from S' flashes, Other Practical and Powerful FunctionsGN60(ISO100, 200mm); supports TTL/M/ Multi modes, up to 1/8000s High-Speed Sync, auto zoom and manual zoom, 2s recycle time; the flash coverage can be set in the range of 20 to 200m, Compatible with Sony CameraCompatible with Sony MI hot shoe cameras, such as A7RIV, A7RIII, A7RII, A7R, A7III, A7II, A7, A7SII, A7SIII, A7S, A6600, A6500, A6400 A6300, A6100, A6000, A58, A99, A99II, A77II, RX10, RX10II/III/IV Cameras.