Neewer 250 Watt Studio Strobe/Flash Light Great for Main, Fill, or Back Lighting Brand new 250w Flash Strobe (master/slave strobe). It could be triggered by a flash, infrared and sync cord (included) The Studio Light is providing you with a Continues Lamp and Flash Function It also comes with a test button and variable dial for power setting from 1/8 to full The Studio Light is providing you with a Continues Lamp and Flash Function It will work as main light, back light or hair light and comes with an easy-to-use umbrella holder