Products - Personal Care/ Model HT-B201   Electric Toothbrush - Model HT-B201 Experience the lightest in weight, lightest vibration on hand electric toothbrush Features 20,000 oscillations/min with just 1 dry-cell battery Experience high-speed vibration with 'Sonic Wave' Easy maintenance Enhanced cleanliness using micro-fine bristles and dual-merit bristles Convenient brush stand included Comes with 1 AA alkaline dry-cell battery, for approximately 2 months of usage Battery operated, for portability and convenience     High-speed vibration with 'Sonic Wave' 'Sonic Wave' refers to the 20,000 oscillations/minute, high-speed, 3-dimensional vibration that moves the brush head. The brush gently presses against the teeth, removing plaque quickly, removes plaque in hard-to-reach areas, such as areas in between teeth.   Designed for ease of use, with less vibration to the hand Experience the lightest battery type sonic power toothbrush, at approximately 64g (including battery). With the "Direct vibration transmitting system", vibration is transmitted directly to the brush head, reducing vibration to the hand, and with anti-slip rubber, it is easy to grip and convenient for everyday use.   Easy maintenance Waterproofing has been improved with the use of waterproof rubber between the main unit and battery. The brush can be kept clean for use by gently washing with water, removing toothpaste and other impurities.   Enhanced cleanliness using micro-fine bristles and dual-merit bristles The long "micro-fine bristles" scrapes plaque from pockets around the teeth, while the ends of the "dual-merit bristles" remove plaque on the teeth surface. Plaque can be effectively removed with the synergy between these 2 types of bristles on the Duplex head.