Godox Thinklite TTL HSS TT685S Camera Flash High Speed 1/8000s GN60 for Sony DSLR Cameras a77II a7RII a7R a58 a99 ILCE6000L, with X1T-S TTL Transmitter (TT685S+X1T-S) It supports Multi/Stroboscopic flash function, as well as auto and manual zoom function with a flash coverage of 20 to 200 mm. With built-in 2.4G wireless flash transmission and TTL compatible flash, your shooting will become simpler. Flash duration: 1/300 to 1/20000 seconds. Exposure control system: TTL auto flash and manual flash. Sync Mode: High-Speed Sync(up to 1/8000 seconds), First-curtain sync and second-curtain sync Suitable for Sony DSLR Camera a77II, a7RII, a7R, a58, a99, ILCE6000L, etc.