The usmile U1 Sonic Electric Toothbrush is a perfect combination of technology and esthetics. Equipped with a large capacity battery and a high-efficient motor, it can serve for up to six months on a three-hour charging. The USB charging mode significantly enhances the charging efficiency (10 times faster than the traditional mode). Additionally, it can be charged by a popular mobile phone charger with a common Micro USB data cable. The wall-hanging accessory can meet the needs of the modern bathroom which is lacking of space and prevent the bottom of the brush from being polluted by molds. Fully loaded with professional functions such as a smart timer and 3 intensity settings, this product gives you an excellent brushing experience and a brighter, healthier smile.