Waterproof : IPX7
Uniqe patented magnetic levitation brushless motor, over 31,000 strokes/min; 
Waved surface w/Pedex wear indicator bristles;
Memory function set for used brush mode;
USB Direct charging, convient for travel use;
Travel lock function;
2 minutes auto-timer w/ 30 seconds alerting;
4 brushing modes;
Red change to green charge indicator, red light flashing for low battery reminder;
800mAh Lithium battery, one full charge for up to 21 days using;
Certificate/registration: CE(EMC), FCC, RoHS, FDA