Portable & powerful, the Godox AD600BM Witstro Manual All-in-One Outdoor Flash makes shooting photos and videos in low-light conditions an easy task. It provides a total power of 600Ws, a recycle time range of 0. 01 to 2. 5 seconds, a high guide number of GN87, & 9 steps of power output ranging from 1/256 to 1/1. This outdoor flash is compatible with a variety of Godox camera flashes, outdoor flashes, & studio flashes. Note: AD600BM is a Bowens Mount High Speed Sync Outdoor Flash, whose brightness should be adjusted manually. Without TTL Function! Features: Model: AD600M/AD600BM Flash Mode: Wireless off, M/Multi Guide No. (m ISO 100): 87(m ISO 100, with AD-R6/R7 standard reflector) Flash Duration: 1/220 to 1/10000 seconds POWER: 600W Power Output: 9 steps：1/256~1/1 Stroboscopic Flash: Provided(up to 100 times, 100Hz) Sync Mode: High-speed sync (up to 1/8000 seconds), first-curtain sync, and second-curtain sync Delay Flash: 0. 01~30 seconds Mask: √ Fan: √ Beeper: √ Modeling Lamp(LED): 10W Optical Slave Flash: S1/S2 Flash Duration Indication: √ Display: Dot-matrix panel Wireless Flash: Wireless Flash Function: Slave, Off Controllable Range(approx. ): 2. 4G, 5: A, B, C, D, E Transmission Range(approx. ): 2. 4G, 80m Channels: 2. 4G, 32: 1~32 Power Supply: Power Supply: Lithium battery pack (11. 1V/8700mAh) Full Power Flashes: 500 Recycle Time: Approx. 0. 01~2. 5s Battery Indicator: Yes Power Indication: Power off automatically after approx. 60 minutes of idle operation Sync Triggering Mode: 3. 5mm sync line, wireless control port Color Temperature: 5600 200k Package Content: 1* AD600BM Main Flash 1* Flash Tube 1* Lamp Cover 1* Lithium battery pack 1* Battery Charger 1* Power Cord 1* User Manual