USB portable chargingTeeth Polisher Electric Professional is Type-C socket USB charging, can be applied to rechargeable batteries, car, PC side charging, charging once 2.5 hours, can be used more than 10 times IPX6 waterproof & built-in LED lightTooth Polisher and Tooth Stain Removers shell is with IPX6 grade waterproof function, the handle will not be damaged with water (can not be immersed in water), you can turn on the LED light to use when using, safe and convenient 5 cleaning modes Dental Calculus Plaque Remover has 5 modes, including soft, normal, middle, strong, super strong mode, corresponding to choose their own suitable mode to use, it is recommended to use medium or above mode for better cleaning effect. Use time should be 20 minutes or more. It can reduce the damage that manual dental tools may cause to your teeth and keep your teeth and gums healthy Customer Service: provides customer service, if you have any questions, please contact us through Amazon, we are happy to answer any questions and bring you satisfaction 5 replacement heads Tooth Polisher Electric Professional has 5 different replacement heads: 3D silicone tip, umbrella polishing head, flat bristle brush head, pointed bristle brush head, polishing massage cup. The unique design easily removes stubborn stains, flat stains, and interdental stains from teeth, making teeth smoother and shinier