?Everything You Need?: The dental plaque remover tool includes 4pcs stainless steel replacement heads (2 x pointed, 2 x flat), a wrench, a dental mirror, a dental pick, and a tongue scraper. The set also includes a storage bag and box to help you store accessories. If there is any issue with the electric plaque remover, please feel free to contact us. ?User-Friendly Design?: The electric plaque remover for teeth features 2 types of stainless steel replacement heads and 3 settings modes suitable for all cleaning needs. Food-grade ABS material for non-slip easy-grip. IPX6 grade waterproof can be washed directly with water, safe and convenient. It is powered by USB (no more than 5V, 2A) and more than 2 hours of continuous use with one full charge. It is recommended to charge at least every two months. ?How to Use?: Firstly, tighten (must tightened) the cleaning head and clean it before use, then short press the button can open and switch mode, the "Work" and"Mode" lights are on at the same time, touching teeth or hard objects and start to work. ?So Safe For Your Gums?: The dental calculus remover is activated only when the cleaning head touches teeth or hard objects, and it will stop vibrate automatically when it touches soft gums. It is helpful to avoid toothache and gum illness, and also product your gums, friendly to beginners. ?40 kHz High-Efficiency Plaque Remover?: Electric teeth cleaner adopts the powerful technology (frequency: up to 40 kHz) Which can effectively remove dental plaque, tartar, and teeth stains. (NOTE: The handle will not vibrate and also without working sound. When you press the low/ mid/ high mode and working mode at the same time, use it on your teeth or hard objects and you will feel it working).