Neewer 250W Strobe/Flash Light for Studio, Location & Portrait Photography This is a brand new 250ws Flash Strobe (master/slave strobe) It could be triggered by a flash, infrared and sync cord (included). 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