Product DescriptionToothbrush Sanitizer KH-106 series can fit for different kinds of toothbrush UV Toothbrush Sanitier use ultraviolet light and small ozone to kill over 99.9% of germ and virus, universally fit for different kind of toothbrush, Automatic timer: 3 minutes, operated by 4 pcs of AA batteries , it's a kind of healthy and nice gift for your family and for your friends.Detailed Images185nm UV lamp. 185nm UV lamp will emit UV light as well as small ozone , it's more effective to kill up bacterias than 254nm UV lamp Battery2pcs of AA alkaline battery can be used for half month at least if it's used 10 times per day.