UV-C Germicidal Technology: This UV toothbrush sanitizer uses UV light to physically kill up to 99.9% of bacteria on your toothbrush without chemicals, providing you and your family with clean toothbrushes for good oral hygiene Suitable for 99% Toothbrushes: This toothbrush sanitizer and holder has an upgraded hanging slot with two holes 0.31 inches on the left and two holes 0.39 inches on the right to accommodate most common electric and manual toothbrushes, including Oral-B Built-in Rechargeable Battery: Don't worry that there is no extra socket in your bathroom. This toothbrush sanitizer has a built-in battery that lasts up to 30 days after 4 hours of charging. It's also a perfect bathroom toothbrush holder to save spaceand keep your bathroom countertops tidy Easy to Install: This UV toothbrush sanitizer holder easily mounts to a smooth surface using a strong adhesive strip(Please use screws when installing on painted walls). We include an extra piece of the adhesive strip, no need to buy it when you changethe position