Godox QS Series QS400 400W Strobe Flash Modeling Light for Studio Photography (100V-120V) + CEARI Microfiber Clean Cloth Perfect Suitable for wedding, advertisement, portrait, and fashion photographer Fast recycling time : 0.3-1.2 second recycle time and 1/2000 to 1/800s flash duration for stopping of fast moving objects and action. Wireless power control and flash triggering system (optional), Special trigger wirelessly controls flash power level, modeling light, buzzer, etc Precise Power Adjusting, 30 steps from 5.0 to 8.0 in 0.1 increments shown on LED display Compatible with Godox FT-16 Remote Controller Trigger