Features: The sonic SG-507 is up to 40000 micro-brushes per minute, high efficiency. 5 selectable modes meet you various needs of cleaning and whitening your teeth. The small toothbrush head make the oral cleaning more flexible and effective. IPX5 waterproof grade, 2-minute smart timer offers non-abrasive cleaning. Ultra comfortable toothbrush handle, anti-slip and soft handling. USB rechargeable, a full charge will provide you up to 4-week using. 5 Modes: White: Offers to remove those hard to remove stains, for ultimate cleaning and whitening. Clean: Standard everyday cleaning mode. Sensitive: For first-time user to get used to sonic cleaning. Polish: Help to remove stains and shine your teeth with short back and forth vibrations. Massage: For individuals with sensitive gums, provide a gentle massage on your gums.