Feature 1.Intelligent High-frequency Ultrasonic: The ultrasonic wave generated by the oscillator makes a sizzling sound without feeling the vibration when held in the hand. The working head has a certain curvature, which does not damage the gums while cleaning the teeth. 2 million times/min ultrasonic vibration, 42KHz sound wave frequency. 2. LED Circle Auxiliary Light 360-degree circular spotlight, precise teeth cleaning without dead ends. 3. Space Aluminum Body Feels great. Not afraid of falling, scratching, paint peeling, and anodized surface. 4. 4 Cleaning Heads Use grade stainless steel, no rust, no fading. Safe and secure. Wide head: clean larger calculi and stains on the neck and flanks of the gums Pointed tip: cleans tartar and stains on the gums Dust protection, independent protective cover, keep clean. Equipped with professional dental mirror. 5. 3 Intensity Modes The LCD screen design is clear at a glance. Cleaning: Designed for sensitive teeth, cleaning the surface of tooth stains Strengthen: Increase frequency to clean stubborn tooth stains Powerful: deep cleansing, suitable for stubborn dental calculus, etc. 6. IPX6 Waterproof The working head part can be washed with water, but the machine body cannot be washed with water. Intelligent and safe, automatically turn off the power within 10 minutes. Specification: Rated Voltage: 3.7V Rated Power: ?3W Rated Input: 5V 1A Waterproof Level: IPX6