Electric toothbrush for adult with USB charging full waterproof 4 toothbrush head

Ultrasonic electric toothbrush adult USB charging household full waterproof 4 toothbrush head Advantage:2 minutes smart timer30 seconds pausing reminderPrevent tooth decay, waterproof grade IPX7Clean and whiten teethFresh breath improve gum healthHigh-speed sonic waves technology,31000 times/min vibrational frequency6 times cleaner than manual brushingUSA DuPont material toothbrush head, comfort and no hurting your teeth3 year's design with advanced technologyMassage electric toothbrush, enjoy brushing your teeth. USB charging can run 30 days on a single charge automatic Memory System, the toothbrush will change the frequency automatically to the last frequency you use in every start Tips: When you receive the product for the first time, we strongly recommend that you use it after it is fully charged.