R4 LED Light features: Power Supply Methods:Sony NP-Series Li-ion rechargeable battery (NP-F550/F750/F960/F970). 5600K Pure Color Power LED's Equipped with 4 high qulity Super Bright, Pure Color Power LED's that produces a very clean and natural color.Color Temperature is steady even in a long time lighting. above 30000H lifetime:R4 is a super light with high efficience,energy conservation and less light loss. Super Bright 700 Lux R4 is a high bright (700 lux) LED with 4 individual LEDs, Pure Color Power LED bulbs. Two Magnetic Filter Plates The R4 has magnetic filter plates that simply installed to the side of the LED light. Magnetic Yellow Warming filter & Magnetic White Diffusion filter. Heat Free LED This light uses LED technology which offers heat free operation only drawing 12 watts of power. Compact Design Less than 6" at its longest side Flicker Free / Dimmable 25-100% The R4 produces a flicker free light and has a rear facing dimmer knob that can be adjusted from 25% - 100%. Shoe Mount The R4 comes with a swivel shoe mount adapter that is perfect for mounting on any DV or DSLR camera such as Canon 5D,7D. Attention: when the electric will run out of time,power will be cut off,after few seconds it will re-open,it can still light up a few seconds,then will be cut off again.Please replace the batteries at this time,to preven influence onuse. got it from http://www.led-video-lights.com