oclean f1 sonic electric toothbrush ipx7 waterproof smart tooth brush for ultrasonic automatic fast charging

oclean electric toothbrush main features: 1. small yet powerful,up to 36,000 vpm with 3d designed toothbrush head.a 2 hours charge lasts 30 days.simply switch 3 modes through the button above the led indicator. 2. simply switch the mode by 2 seconds long pressing on the button.or shortly press to turn on/shut-down.the led light will indicate the different mode of cleaning.when power goes low,the light will turn red.