Electric Toothbrushes, USB Rechargeable Ultrasonic Tooth Brush with 4 Brush Heads 6 Cleaning Modes and Smart Timer IPX7 Waterproof Cleaning Toothbrushes for Adults and Kids（Black）

Wet brush head, apply toothpaste, guide along tooth surfaces in gentle circular motions, brush tongue and roof of mouth, brush for two minutes, twice a day. Charge for four hours before first use, fully charge when battery level is low, replace brush head every three to six months.