[Safety and Correctly Using] The J2 dental plaque remover tool only works when it touches with teeth and hard objects etc, stop vibrate when touching gums and soft . A dust protection case keep your device clean. This device is not a replacement for dental floss and toothbrushes, as each of which serves a different . [Efficiently Ultrasonic Dental Cleaner]This plaque remover tool is designed to efficiently clean teeth such as teeth stain tarter plaque calculus. Suitable for anyone looking to take better care of their teeth. Intelligent high-frequency sound waves can deeply clean teeth without hurting gums, effectively remove stubborn stains and tartar, and keep oral cavity comfortable and clean. [3 Modes & 2 Cleaning Heads]Your calculus remover tool for teeth has 3 working modes for different sensitivity of gums, meet your different needs. Dental kit comes with 2 compatible cleaning heads, pointed head suit for clean small stains in the gums, flat head suit for clean tartar in the teeth surface. [Advantages of J2 dental Scaler] Built-in high-capacity battery, ABS shell, exquisite and compact, easy to carry, easy to achieve comfortable teeth cleaning, built-in overcharge and over-discharge chip, USB charging, charging and discharging power indicator. J2 dental Scaler Specifications: Product Model: J2 dental Scaler Working frequency: 2.4G Working voltage: 3.7V Maximum power: 0.5W Input interface: TYPE-C Input parameters: 5V/0.3A Power Type: Polymer Battery life: about 80 minutes Working environment: -10-50 degrees Battery capacity: 500mAh Switch type: lamp head push switch Working mode: long press for three seconds to power on/off Charge and discharge protection: built-in overcharge and overdischarge IC to prolong battery life Strong Mode: Low/Mid/High Waterproof level: IPX5 (rainproof, splashproof) size: 176 x 26 x 25MM Material: ABS colour: White Package Contents: 1 x Visual Scaler 1 x Data Cable 1 x Wrench 2 x Working Tips Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.