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Home Ultrasonic Calculus Remover 3 Mode Electric Portable Dental Scaler Tooth Cleaner Smoke Stains Tartar Plaque Teeth Whitening Cleaning Device   How to distinguish true and false ultrasound   Real ultrasound: 1. It will resonate when it touches a hard object, and it will automatically stop when it touches a soft gum 2. No noise   Fake ultrasound: 1. Pure physical vibration 2. Loud noise   Features: 1.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. 2.The tip is ergonomically made and conforms to oral anatomy, let you easily reach the blind corners and maintain a high level of hygiene. 3.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 goog as new after many times of use. 4.Armed with a strong LED light to help light up every corner in your mouth, making your teeth cleaning more conveniently and efficiently.   Specifications: Material: ABS+PC Color: white Size: 19*2.5*2.5 Weight: 150g Work frequency: 37KHZ+/-3KHZ Life expectancy: 8000H Charging time: 2.5h Battery Capacity: 500mAh   Packing list: 1* Calculus Remover 2* Working Tips 1* Mini Wrench 1* Charger Cord 1* User Manual