Effective cleaningThis ultrasonic dental scaler uses high-frequency sound waves 31,000 times per minute to clean your teeth and freshen your breath, which is an indispensable helper for oral care. Five-speed modeThe five-speed mode is suitable for different tooth conditions and meets the needs of different groups of people. One key can switch modes, simple and fast. Multiple accessoriesThree replaceable toothbrush heads can be used for daily tooth cleaning, and two high-quality medical grade alloy steel replacement heads can be used to remove tartar, tea stains, and smoke stains. USB chargingUSB universal interface, can be connected to mobile power, computers and many other digital products for charging,long-lasting battery life, convenient for you to use anytime,anywhere. Specifications: Material: ABS Charging method: USB interface Battery: Lithium battery Rated voltage: 3.7V Rated current: 500mA Power adapter: 5V Vibration frequency: 31000 timesmin Charging time: about 2HWaterproof rating: IPX6