The products use the cold cathode ultraviolet tube. The ultraviolet ray of 253.7 nms which send out by the tube can be easily absorbed by the protein and nucleic acid of germs and virus. technique parameters: 1. Power source: 6XAA size batteries 2. Power consumption: 1W 3. Current: less than or equal to 120 mA 4. Tube life: GE 5000hrs 5. UV strength: GE 2000μw 6. Ozone density: GE 0.01ppm less than or equal to 0.8ppm 7. Working time: 3 to 5 minutes