This U-shaped automatic toothbrush snap fit design is tailored made to fit the mouth and clean the surface & internal orientation of the teeth. Made from “food-grade silicone”, it's highly water-repellent, washable and reusable. Speed up to 670 brush movements per second. Specially designed seals and gaskets keep the toothbrush water tolerant and it removes 300 percentage more plaque along the gum line than a regular manual brush.