Portable UV Toothbrush Sterilizer Microcomputer automatic control,5 minutes sterilize, automatic power cut. Technique parameter: Battery: AAA,2EA 1.5V Battery life:50days(twice/day) Tube life: >3000hrs UV strength: > 250uw Ozone density: >0.01ppm< 0.6ppm Unit size:218(L)x50(W)x28(H)(mm) Weight:102g