This product is specially designed for families, simple, fast and efficient. There are five modes to choose from: soft, normal, middle, strong, fierce. Integrated design, LED lighting on the head, clear observation of oral conditions. Using true ultrasonic technology, the working tip will only vibrate when it touches teeth or hard objects made of ceramic or metal, and will not vibrate when it touches gums or other soft objects. Vibration Frequency: 30~40KHZ Ultrasonic Resonance: 2 million times/min Rated Power: 0.3W Battery Capacity: 500mAh Charging Time: about 2 hours Use Time: about 5 hours Power Supply Mode: Type-C Charging Charging Voltage: DC5.0V Rated Current: 0.15A Working Temperature: 0-40 Waterproof Grade: IPX5 Life Waterproof Material: ABS+PC Color: White, Green(optional) Weight: 250g Size: 20 x 2.4cm Package List: 1 x Ultrasonic Scaler 1 x Sharp Elbow 1 x Flat Elbow 1 x Open-end Wrench 3 x Stainless Steel Tools 1 x Charging Cable 1 x Manual