Sonic Electric Toothbrush Adult Soft Bristle Toothbrush IPX7 Waterproof Teeth Cleaning and Whitening Machine Remove Tartar Stains Oral Cleaning Wireless Charging Imported high-frequency pulse motor, up to 60,000 times/min of sonic vibration, deeply cleans the blind area between the teeth, effectively removes plaque, and gently cares for the gums. 6 cleaning modes, 18 gears, 2-minute intelligent timing, let you develop a good habit of scientific brushing. USB charging, can last up to 45 days on a single charge and up to 200 hours of standby time without frequent charging. How to install and brush your teeth: when the front of the brush head is in a straight line with the buttons of the host, just insert the brush head into the host. After installation, there is a slight gap between the brush head and the host, which does not affect the vibration frequency.