With this Godox AD-B2 Dual Power Flash Head you can turn two Godox Witstro AD200 flash units into one powerful flash head. All you have to do is insert the flash tubes of the AD200 flash units into the AD-B2. You now have a flash head with a light output of 400W / s and a light modification friendly Bowen S-type mount. This allows you to use a wide range of accessories such as reflectors and softboxes. A 5/8 "connection is fitted on the bottom for mounting on lamp stands.