Main Features: High cleaning frequency: max 31,000 times/min Help to improve scientific brushing habit: intelligently shake to remind you to change brushing area, and automatically turn off while reaching 2 minutes ( a suggested the best brushing period ) Round brushing head + arc brushing surface: avoid hurt, deep cleaning includes dead corner IPX7 full body waterproof level for direct washingAbout 25 days durationsonic electric toothbrush 3 vibration modes: 31,000 times/min, 27,000 times/min, alternate vibration every minute RPM: 31,000 times/min or 27,000 times/minelectric toothbrush, smart recharge toothbrush Battery Information: 700mAh,Charging Time: 16h work timesonic toothbrush