This device uses high-frequency vibration to help remove dental tartar, tartar, smoke stains, tea stains, etc., and restore healthy and clean teeth. Three professional cleaning heads work together to complete cleaning and polishing in one machine; the third mode can be freely selected to meet the needs of different users. The overall design is simple and intuitive, and easy to operate. It is an oral care tool suitable for family use. Note 1. This device is for adult use only. Keep away from children to avoid accidental injury. 2. Do not immerse the device body in water. 3. This device is equipped with a rechargeable battery. Please do not put it in a fire or charge it. Please use and store it in a high temperature environment. 4. Do not touch the working head with your hands when the equipment is working to avoid injury. 5. If the equipment is obviously damaged, do not use it. High-efficiency: high-frequency vibration, good tartar removal effect. Multi-purpose: 3 cleaning heads, 3 modes, solving a variety of problems. Reliable: stainless steel working head, waterproof body, safe and intimate: LED lamp auxiliary lighting, accurate tartar stain positioning and environmental protection Built-in 250MAH rechargeable battery, durable Flashing green light indicates that the device is charging. 2. Use a DC charging cable to connect the device to a 5V/1A adapter (not included), and then turn on the power. 3. During the charging process, the three mode indicator lights flash green, and it will go out automatically when it is fully charged. Use steps 1. Select and install a suitable cleaning head. 2. Clean the tip with water or alcohol. (Note: It is recommended to use alcohol for disinfection.) 3. Press the "on" button to turn on, and the LED light will automatically light up. The default mode of starting the machine is gentle. 4. Press the mode key to select the mode. There are three modes: soft mode, normal mode and powerful mode. (Note: Gentle mode is recommended for the first time.) 5. Look in the mirror and gently place the working point on the teeth to start working. Note: When removing calculus, it is recommended that the teeth and the working tip maintain a 45 angle; when removing stains and polishing, it is recommended to maintain a 90-degree angle between the teeth and the working tip. Note: Do not press the cleaning head forcefully during use. 6. After use, press the "on" button to shut down, and the LED light will automatically go out. Rinse your mouth with water. 7. Rinse the cleaning head with water, let it dry or air-dry, and then store it in a clean place. Care and maintenance 1. If the body is stained, it can be wiped clean with water or a damp cloth. 2. Please store the equipment in a cool and dry place, avoid direct exposure to high temperature or strong light. 3. Please keep the equipment out of reach of children to avoid danger. 4. The device is equipped with rechargeable batteries. To protect the battery life, charge it every three months when it is not in use for a long time. 5. Without permission, it is not allowed to disassemble the equipment for maintenance. If there is any malfunction or normal operation, please contact the customer service center. Specification model: Electric dental scaler Battery capacity: 250mAh Charging method: DC charging Working voltage: 3.7-4.2V Rated current: 130mA Max Waterproof rating: IPX6 Storage temperature: -10C-40C "All our products have undergone strict quality inspections. If you have any quality problems or you are not satisfied with the product, please contact us and we will provide you with the best solution."