Specifications: Brand: Godox Model: QT600IIIM Power: 600Ws Flash Mode: M/ Multi/ High-speed Sync Guide Number: 76(in 1/1 full power, ISO 100, using highlight or standard reflector) Flash Duration(t0.1): 1/530s-1/26100s(high-speed flash mode), 1/530s-1/6010s(stable color temperature mode) Color Temperature: 5600K±200K(stable color temperature mode), 5400K-9500K(high-speed flash mode), 4600K-5000K(high-speed sync flash) Recycle Time: Approx. 0.01-0.9s Output Level: 1/1-1/256(M), 1/1-1/32(HSS), 1/4-1/256(Multi) Multi Flash: Yes, max. flash time 99, max. flash frequency 30 Sync Mode: High-speed sync(up to 1/8000s), first curtain sync, second curtain sync Delay Flash: 0.01-30s LED Modeling Lamp: 40W Brightness of Modeling Lamp: 1%-100% Receiver Model: s1/ s2 Wireless Function: Receiver unit, ON/OFF Controllable Receiver Units: 16 groups, 0-9, A, B, C, D, E, F Transmission Range: Approx. 50M Channel: 1-32 ID: 01-99 Sync Triggering Mode: Built-in 2.4G wireless transmission Working Environment Temperature: -10℃ to 50℃ Item Size: 39.2 * 17.6 * 14.3cm/ 15.4 * 6.9 * 5.6in Item Weight: 3.33kg/ 7.3lbs Packing List: 1 * Light Body 1 * Lamp Tube 1 * Light Cover 1 * Glass Protection Cover 1 * Power Cord