-Home Ultrasonic Calculus Remover 3 Mode Electric Portable Dental Scaler Tooth Cleaner Smoke Stains Tartar Plaque Teeth Whitening Cleaning Device -It will resonate when it touches a hard object, and it will automatically stop when it touches a soft gum -No noise -Pure physical vibration -The teeth cleaner is adopted by high frequency vibration theory, with a working frequency up to 200 million times per minute -Combined with the professional grade cleaner tip, it is effective in removing stubborn stains and dental calculus. -The tip is ergonomically made and conforms to oral anatomy, let you easily reach the blind corners and maintain a high level of hygiene. -Made of medical grade titanium alloy and stainless steel, with high toughness, anti-scaling and anti-rust, which offers you as long as 8000 hours service time and will be as good -Armed with a strong LED light to help light up every corner in your mouth, making your teeth cleaning more conveniently and efficiently. -Material: ABS+PC -Work frequency: 37KHZ+/-3KHZ -Life expectancy: 8000H -Charging time: 2.5h -Battery Capacity: 500mAh