Electric Sonic Oral Teeth Cleaner

Attentions1.Long press to turn on/off the device2.The equipment preset 10 minutes automatic shutdown function to prevent overheating3.It blinks while charging,and it won't shows the power(so you will see an empty battery sign but it's not empty),the blinks stop when it charges full4.You need to unplug the charging cable before turn it on and use5.The device works when it touches a tough thing like teeth,if you use it on the skin,it will not work6.The first charging time takes at least 3 hoursHome Ultrasonic Calculus Remover 3 Mode Electric Portable Dental Scaler Tooth Cleaner Smoke Stains Tartar Plaque Teeth Whitening Cleaning DeviceHow to distinguish true and false ultrasoundReal ultrasound:1. It will resonate when it touches a hard object, and it will automatically stop when it touches a soft gum2. No noiseFake ultrasound:1. Pure physical vibration2. Loud noiseFeatures:1.The teeth cleaner is adopted by high frequency vibration theory, with a working frequency up to 200 million times