Buy from Amazon : br br StudioPRO 400 Watt Photography Studio Monolight Strobe Flash Lighting Head SD-400 br br MonolightsStrobe heads will give the photographer much more lighting power as well as more lighting control than continuous lighting sources With MonolightsStrobe heads photographers are able to use more power which leads to lower ISOs less grainnoise faster shutter speeds moving subjects and greater apertures f64 f45 f32 br The StudioPRO SD-400 400Ws Monolight is a well-built and powerful strobe head that makes a great addition to any studio It has a digital dial which allows the photographer to adjust the power 110th of an f-stop br It is compatible with any light modifier with a Bowens speedring and is equipped with an umbrella mount br The StudioPRO 400Ws Monolight has a fast recycling time of 3 seconds or less br 150W Halogen Modeling Lamp AC power cord and PC sync cord included