The Hensel Certo 400 Monolight is a light source with solid, dependable core features. The head offers a 7-stop power range, from 7 to 400Ws with very fast recycle times of 0.5 - 1.1 seconds with flash durations as short as 1/2500 second for effective action stopping. The head also features a built-in, 16-channel radio receiver, compatible with Hensel's optional Cactus transceivers with triggering capability at distances up to 328'. The Certo 400 comes with a power cable, transport cap, and a stand adapter with built-in umbrella holder.