UV sanitizer (sometimes called also UV sterilizer) is a device that uses ultraviolet (UV) light to kill microorganisms.
UV toothbrush sanitizer is a type of UV sterilizer designed specifically for electric (or manual) brushes, and it destroys bacteria, viruses, and mold that can be present on the brush head. UV light kills some microorganisms and makes others unable to reproduce.
UV light is also used to sterilize medical equipment, food, water, and air.
The toothbrush UV sanitizer is used for sterilizing toothbrush heads. Toothbrushes and brush heads can also be stored in some sanitizers.