1.Effective cleaning - This ultrasonic scaler uses high frequency sound waves of 31,000 times per minute to clean teeth and freshen breath, making it an indispensable oral care assistant. 2. Five-speed mode - Five-speed mode is applicable to different dental conditions to meet the needs of different people. One key can switch between different modes, simple and fast. 3. Multiple accessories - Three replaceable toothbrush heads for daily brushing and two high quality medical grade alloy steel replacement heads for removing tartar, tea stains and tobacco stains. 4. USB charging - universal USB interface, can be connected to mobile power, computer and many other digital products for charging, long battery life, convenient to use anytime and anywhere. Specifications: Material: ABS Color: white, green, black Size: 21.5*2.5*2.5 cm Weight: 0.19 kg Package size: 24.5*10*3.5cm Charging method: USB interface Battery: lithium battery Rated voltage: 3.7V Rated current: 500mA Power adapter: 5V Vibration frequency: 31000 timestamps Charging time: about 2H Waterproof rating: IPX6 Packing list: 1 * host * 1 1 * Glazed head 1 * flat head 1 * dental mirror 2 * Dental head 1 * USB charging cable 1 * English user manual