Waterproof: Waterproof rating - IPX7. Teeth Cleaner: Get a 2-in-1 ultrasonic tooth and plaque cleaner. Includes: Package includes one host, one USB charging stand, one manual, one dental mirror, two dental cleaning heads, and three toothbrush heads. Clean: This dental scaler uses high frequency sound waves to clean teeth and freshen breath. Modes: Use the key to switch between the five modes and change the head attachment to suit your needs. Charging: USB charging time - 2 hours. 2-In-1 Electric Tooth And Plaque Cleaner | Living Social