Brush rotation around，Rotate 6000 times per minute. The brush head can be replaced.,Toothbrush body waterproof.It has CE certificate and ROHS, LFGB, FDA environmental certificate. Material: Japan toxic toothbrush head POM;DuPont nylon bristles;body using non-toxic ABS. Package: Double-sided pressure plastic packaging 1 body: 1 pcs toothbrushes + 3 pc toothbrushes head​ Battery: 2 pcs AAA battery ( not included in package)​ Use: 1.Insert two 1.5V AAA alkaline super power batteries; 2. Dip the bristle in some water and put the toothpaster on it; 3. Put the bristle on the toothbrush head and swith on the button; 4. the dentists suggest to use at lease 2 minutes to brush the teeth, brushing the outside first and the inner side of the chew side last; 5. Wash the toothbrush with some water and dry it; 6. Replace the brush attachment every three months for the best brushing results.