Your regular toothbrush does a great job of clearing away most surface buildup on your teeth. But there are many times when it leaves something left behind, too. 
An electric toothbrush, has the power to get rid of harmful plaque and stubborn particles on your teeth. The bristles move faster and more powerfully than on a manual toothbrush, so more debris is removed with each use. This improved cleaning helps your mouth stay healthy and your breath remain fresher.

Electric toothbrush K21, it has follow advantages:
1. Magnetic levitation high frequency vibration
2. DuPont Nylon soft bristle brush head
3. IPX7 waterproof
4. 45,000 times / minute high-frequency vibration to deeply cleans every tooth
5. Used with 1pc “AA” dry battery (not include)