The toothbrush use 3D rotation and vibration  technique,it can rotate 8000 times per minute , and porpoise  20000 times per minute, the brush head select Dupont tynex bristle to effective prevent recession gums. The charger of toothbrush  can work  under water circumstance , meanwhile the toothbrush hve notificatin fuction , every 30 seconds remind user to chang brushing section, after 2 minuts will automatic end up brushing .