The product use the cold cathode ultraviolet tube. The ultraviolet ray of 253.7 nms which send out by the tube can kill the germs and virus. voltage: DC 3V 2XAAA , working time: 3～5 minutes , current: ≤100 mA , working temperature: -10 ～ 50 °C 6, tube life: ≥10000 hours