Features:1. The tooth cleaner is adopted by the theory of high frequency vibration, frequency of work up to 45,000 times per minute. Combined with professional cleaning tip, it is effective in removing stubborn stains and stonesDental. The tip is ergonomically made and conforms to the oral anatomy, allows you to easily reach the blind corners and maintain a high level ofHygiene. Made of medical grade titre alloy and stainless steel, with high hardness, anti-fouling and anti-rust, offering you up to 8000 hours of service time and will be as good as new after many times of service.Use. Equipped with strong led light to help illuminate every corner of the mouth, making your teeth clean more comfortable and efficient.Specification:Material: abs, medical grade stainless steelColour: whiteSize: 180x24x13mmWeight: 80gFrequency of work: 37khz +/- 3khzTensao: 5.0vNominal power: 1.5wFood: usb charging timeCharging: 1.5-2hBattery capacity: 600mahPacking list:1* ultra-sonic tooth cleaner1* mini key4 * dental tools1* usb charging cableInstruction precautions:1. Press and hold to turn on/off theDevice. The computer preset 10 minutes of automatic shutdown function to avoid theOverheating. It flashes during charging and does not show power (then you will see an empty battery signal, but not empty), the flashing stops when fullyLoaded. You must disconnect the charging cable before turning it on and using it.5. The device works when you touch something hard like teeth, skin, if you use it, it won't work. The first charging time takes at least 3 hours.