Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si 1. The life of LED lamp is up to 20,000 hours, and the durability is more than 40 compared with fluorescent lamp 2. The brightness can be adjusted from 0 to 100% 3. Even if the brightness is adjusted, the color temperature remains the 4. There is no flash of fluorescent light, which has a good protective effect on human eyes under microscope observation 5. The brightness is above 35,000lux (the working distance of the ring light is 75mm) Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. Number of LEDs: 56 Input voltage: AV100~240V (Allowed AC90~264V) Input voltage frequency: 50/60HZ consumption: 4.5W Output voltage: DC24V Lighting : constant voltage and constant current Brightness adjustment range: 0~100% Ambient temperature and humidity: 0~40 Celsius/20~80%RH Colour:white Material:plastic Size:inner diameter: 63MM Package Contents: 1 x ring light Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.