The Profoto D2 1000Ws AirTTL Monolight features a 300W modeling lamp, an extremely fast flash duration of 1/50000 and fast recycling to full power in 1.2 seconds. Unlike the Profoto B1X, which is battery powered, the Profoto D2 is AC powered. It has a 10 stop power range and high speed sync up to 1/8000 of a second, which lets you control the exposure and lighting as well as the ability to stop action.