1. CCC certification, AA level illumination certification, blue light hazard level certification
2. U.S. ETL/FCC certificated
3. European CE/CB safety certificated, ERP certificated
4. Build-in power, over-voltage/over-current protection
5. Met the requirements of eye protection, no harm of blue light, no strobe, no noise
6. Voltage range: 100-240Vac
7. Support USB charge
8. LED display screen demonstrating calendar, alarm clock, timing, and other function