Photoflex FlexFlash 400Watt Strobe with 2 x UM-ADH30 Silver Umbrellas is equipped with a standard S-Type Bowens Mount for reflectors and light modifiers. It uses a 250Watt Modeling Light. And with auto voltage detection, it has the ability to be used worldwide. The FlexFlash 400W Strobe with its full-featured easy to read digital screen has a flash duration of 1/800 second. Gives you double the power of the FlexFlash 200w model: ideal for product photography and shooting large groups. With the power output display options, you can switch between decimal or fractional display for spot-on accuracy of your exposures. The FlexFlash 400 strobe: Designed smart, powerfully built for today's photographer yet attractively priced.