GODOX TT685C FEATURES GN 60 (m ISO 100) Powered by 4 x AA batteries HSS to 1/8000th Flash Mode – ETTL /M / Multi 1st Curtain Sync / 2nd Curtain Sync FEC / FEB – 1/3rd Increments (±3 stops) Manual Flash – 1/128 – 1/1 output control (1/3rd increments) Flash Zoom 20 – 200mm Radio Master & Slave Modes for Godox 2.4GHz X Radio System Compatible with Godox X1T-C, X1T-N, X1T-S, TTL Transmitters, and X1R-C Receivers Mater Groups A / B / C / D / E (In GR Mode – Requires 2012 Onwards Cameras) Slave Groups A / B / C / D / E 32 Channels Range to 100 m Compatible with Godox XTR-16s Receiver, & XT-32 / XT-16 Transmitters Compatible with Godox FTR-16s Receivers, & FT-16 Transmitter Optic Master & Slave Modes for Canon Optic Wireless System 3 Remote Groups A / B / C 4 Channels Range – Line of Sight S1 and S2 Optic Slave Modes Recycle Time: 2.6 Seconds at full power Full 360 Degree Swivel, and Tilt Head Large Dot Matrix LCD Screen AF Assist Light Foot Clamping Ring with Locking Pin Sound Prompt Custom Functions Settings Memory Overheat Protection USB Port for Firmware Updates Communication Port (For XTR-16s / FTR-16s Receivers) 2.5mm Sync Port External High Voltage Battery Port