Amaran 528W is the ultimate LED video light. It features strong and steady light manual brightness control and uses PWM technology to decrease power dissipation. It is expandable for maximum brightness small for easy portability and has an efficient dual power supply system. Use Amaran 528 to get the same professional lighting seen on TV and Hollywood. A. Main Features Functions 1. Digital brightness display 2. Brightness wheel 3. Charges batteries when powered by AC 4. Double power supply system 5. Battery power indicator B. Property 1. High color rendering LEDs (Ra>85) 2. Long lifespan and steady light 3. PWM technology for low power consumption 4. High efficiency energy saving bulbs 5. Efficient heat dissipation; C. Design 1. Slim design (like an iPad) 2. Universal lamp bracket 3. White diffusing filter and orange warming filter (3200K) 4. Light for handheld use 5. Carrying case included; D. Compatible Lithium Batteries: Sony NP-F series: NP-F550 / F570 / F770 / F960 / F970; NP-FM series: FM50 / FM51 / FM55H / FM500H; NP-QM series: QM50 / QM51 / QM71D / QM91D