Ultrasonic Dental Scaler For Teeth Tartar Stain Tooth Calculus Remover Electric Sonic Teeth Plaque Cleaner Dental Stone Removal1. The computer presets 10 minutes automatic shutdown function to prevent overheating2. The device works when you touch something hard like your teeth, it doesn't work if you use it3. Equipped with powerful LED lights to help illuminate every corner of the mouth, making your teeth cleaning more comfortable and efficient.Power source: rechargeable batteryBody material: ABSHow it works: UltrasonicWaterproof performance: IPX7 waterproofPower supply voltage: 5V/1ACharging interface: USBCharging time: 2 hoursRated power: 0.8w<h1 class="product-title-text" data-spm-anchor-id="a2g0o.detail.1000016.i2.20aa7572UpaK62" style="margin-right: 0px; margin-bottom: 0px; margin-left: 0px; line-height: 19px; -webkit-tap-highlight-color: tra