<p>Specifications: Material: ABS+stainless steel Size: 20*2.3*2.3cm Weight: 90g Packing size: 22*7*4.5cm Charging method: USB charging Battery capacity: 800 mA Input voltage: 5V1A Output voltage: 3.7V Rated power: 1.5W Frequency: 37KHZ+/-3khz/ Rated voltage: 3.7V Real ultrasonic high-frequency resonance, 2 million times/minute resonance, 40KHZ vibration frequency, easily crushes calculus, quickly and effectively removes dental stains such as smoke stains, dental plaque and tartar. The four-speed mode can be switched freely to meet the needs of different teeth cleaning and the actual needs of different groups of people. The streamlined body conforms to ergonomic design, with a comfortable grip and suitable for gripping. The dual cleaning head configuration can easily remove the calculus between the teeth and the teeth, and clean the oral cavity without dead ends. Effectively improve gum swelling and pain, yellow and black teeth, tartar, bad breath, tooth decay, dental plaque and other dental problems.</p>