The AD600B Witstro TTL All-In-One Outdoor Flash from Godox is a versatile tool compatible with several TTL systems, including Canon E-TTL II, Nikon i-TTL, Sony, and Panasonic. It offers up to 600Ws with nine steps of output power, ranging from 1/1 to 1/256, and comes with a powerful 11.1V /8700mAh lithium-ion battery pack that provides up to 500 full-power flashes. Alternatively, you can run the monolight on AC power with an optional adapter for situations where portability is not a concern. A useful and interesting feature is its dual-head connection option. Two AD600 flash heads can be mounted to a separately purchased H1200 portable flash head to jack up the power to 1200Ws. The AD600B features a high-speed sync mode that works with shutter speeds up to 1/8000 second to control background light intensity, and offers flash durations from 1/220 to 1/10,000 second for stopping action. Part of Godox's wireless system, the AD600B has an onboard 2.4 GHz X System that allows wireless triggering at distances up to 262' with the purchase of a Godox transmitter. The flash head has a Bowens-type front accessory mount that not only makes it compatible with Godox accessories, but also with light shapers from the many manufacturers that use this popular mount.