ZHIYUN FIVERAY M40 40W Led Lights Handheld Pocket Light Photo Video Lamp Fill Light Photography Lighting. Model Number : FIVERAY M40. 1x Zhiyun M40 Pocket Light. 【Variable-Frequency Cooling Via Modeling】 :M40 adopts the DynaVort Cooling System™ that consists of gyroscope modeling heat sink, FOC fans, and ESC algorithm to prevent overheating.
eBay