TT600S can achieve 1/8000s high-speed sync functions when using in combination with Godox XPro-S high-speed wireless flash trigger. Note: High-speed sync triggering mode is not available when TT600S is mounted onto the camera. With high-resolution LCD panel to offer clear and easy operation. Turn the select dial to choose the amount of the settings. Equipped with Optic transmission and 2.4G wireless transmission, offers you an even illumination and stable power output, giving you more outstanding light effect. Support M/Multi/S1/S2 modes, 20-200mm auto/manual zooming. With C.Fn custom function settings, focus assist lamp, buzz function, over-temperature protection, etc. GN60 (m ISO 100, @105mm), Approx. 0.1-2.6s recycle time, 230 full power flashes (Using 2500mAh Ni-MH batteries), 22 steps of power output(1/1~1/128).