Characteristics: 1. The germicidal ultraviolet light kills up to 99.9% of the bacteria and destroying their ability to multiply. 2.Mini size design: as small a mobile, easily store it in the pocket. 3. Obtains the international authentication.Specification: 1. Power:4 AAA batteries 2. Size:W50.8xD25.4xH101.6mm 3. Weight: about 65g 4. UV-C Lamp:1.5W DC Lamp 5. UV Wavelength: UV-C (253.7nm)