At 15.7 x 17.7 x 3?, the YN900 II LED Panel from Yongnuo is a compact light source with color temperature that?s variable from 3200 to 5500K for easy integration without filters with either tungsten or daylight fixtures or ambient light conditions. The light?s high CRI rating of 95 is an indicator of accuracy in color rendering. The YN900 II has a beam angle of 55?, the output of which can be contoured and controlled by the included 4-way barndoors. Power is handled by the included AC power supply, but the light can also run on optional NP-F Sony-style batteries when mains power is unavailable. Control options offer two wireless solutions ? an included remote control and an App that permits use of your smartphone as a remote with a 49? range.