Unique U-shape DESIGN This automatic toothbrush kit has a unique U-shape design to match the shape of the bite teeth. With high-frequency sound vibration, it can contact the teeth and gums 360 degrees in all directions to quickly and deeply clean the surface and interior of the teeth, thereby protecting the health of the teeth. (It works better with foam toothpaste) Quality Materials & Specifications Made of food-grade silicone to protect your teeth and gum. 10 Days battery timing with 30 minutes of charging (Must be dry when charging). Ultra-fast wireless charging. Also, IPX7 waterproof to be used at bath and shower. Multi-function BRUSHING MODES Our automatic toothbrush is your professional daily dentist. It helps to promote the health of gums and teeth through the following different function modes: Powerful Teeth Brushing (Strong Mode), Comfortable (Medium Mode), Teeth Whitening (Whitening Mode) to suit different conditions of teeth of gums High speed vibration cleaning Speed up to 650 brush movements per second. Specially designed seals and gaskets keep the Sani White Ultrasonic toothbrush water tolerant and it removes 300 percentage more plaque along the gum line than a regular manual brush.