The "Omron sonic Shikiha brush Chou micro vibrato HT-B201-P", vibrate to direct the brush tip by "direct vibration transmission system", grip rubber for vibration to the hand is small and quiet, it is less likely to slip even with since, you can use comfortably every day. The Enhanced waterproof such as adopting a waterproof rubber between the battery cap and body. Since it is possible to wash easily, and washed off the dirt and toothpaste with the body, you can use clean.