Exclusive patent the first electric retractable brush head internal UV disinfection & dust-proof storage making the cleanest electric toothbrush. Magnetic levitation sonic motor 3.6W times/min high-frequency vibration three brushing modes good oral care. IPX7 waterproof inductive charging one-key start storage more convenient operation. Du Pont bristles metal craft body use for 15 days on a single charge protect your health needs. (Include battery no warranty)