Calumet Genesis GF400 Portable Flash System The GF400 Portable Flash System provides 360 degree illumination and boasts 400ws power output with 80m Guide Number and is capable of wireless-remote manual power control when used with the Genesis Wireless Trigger kit (sold separately). The GF400 gives you excellent manual control of flash settings without sacrificing compactness or ease of use. It features intuitive controls, rotating head with 90 degree tilt capability, and removeable reflector. This system has 7-stops of variable output from 1/128th to 1/1 power in 1/3-stop increments. Recycling time to full power is four seconds and the flash duration time is 1/300-1/10000 seconds.