Thank you for purchasing the Thinklite TT600 camera flash. This camera flash adopts wireless X system and 2.4G ratio transmission, which is compatible with AD360II-C, AD360II-N, TT685C, TT685N, X1T-C, X1T-N, etc. Suitable for all DSLR cameras with standard hot shoe, such as for Canon, for Nikon, for Pentax, for Olympus, etc. ---2.4GHz wireless transmission. --- Off-camera max. 1/8000s high speed sync. ---Master & Slave function. ---M manual flash. ---Multi stroboscopic flash. Features: Adopts wireless X-system, with built-in 2.4G wireless transmission to support transmitting and receiving, superior performance. It can be used with AD360II-C/AD360II-N flash, TT685C/TT685N flash, X1T-C/X1T-N trigger and other devices that with wireless control system. When used with X1 TTL wireless flash trigger(Sold Separately), it can realize remote control, high speed sync and more functions, make your shooting simpler and easier. It can be compatible with most brands cameras with standard hot shoe, such as for Canon, for Nikon, for Pentax, for Olympus, etc. Faster recycle time, even light illumination, large size LCD panel. High-speed sync (HSS): Can realize high speed sync when used with cell-II trigger or X1C/X1N TTL wireless trigger (Sold Separately), the max speed can up to 1/8000s (Depend on the cameras). It's particularly convenient when using the aperture to fill flash on portrait preferentially. Please note: HSS triggering mode is not available when TT600 is mounted onto the camera. Support M/S1/S2 modes, 20-200m auto/manual zooming. With C.Fn custom function settings. With flash overheat automatic protection function. Specifications: Guide No.(1/1 power @200mm): GN60(m ISO 100) Vertical Rotation Angle: -7~90 Horizontal Rotation Angle: 0~360 Power Supply: Ni-MH batteries (recommend) or 4 * LR6 alkaline batteries Full Power Flash Times: Approx.230 times (2500mA Ni-MH batteries used) Recycle Time: Approx.0.1~2.6 seconds (eneloop Ni-MH batteries of Panasonic used) Flash Ready Indicator: Red LED indicator will light up when the flash is ready Flash Duration: 1/300s - 1/ 20000s Color Temperature: 5600K200K Wireless Function: Master, Slave, Off Controllable Slave Groups: 5(A, B, C, D, E) Transmission Range(Approx.): 100m(2.4G wireless) Channel: 1~32 Item Size: 6.4 * 7.6 * 19cm / 2.5 * 3 * 7.5in Item Weight: Approx.400g / 14.1oz Package Size: 9 * 8 * 20cm / 3.5 * 3.2 * 7.9in Package Weight: 527g / 18.6oz Package List: 1 * Thinklite TT600 Flash 1 * Protection Bag 1 * Mini Stand 1 * User Manual(English & Chinese) Note: Batteries are not included.