One brush head can be used for 6-12 months (this set of brush heads also comes with a replacement brush head). The number of bristles increased from 768 in the third generation to 1908. In order to better brush teeth and massage gums, external testing also added brush heads. One click operation with four modes: A. Power mode, Power swipe; B. Medium mode, comfortable for brushing teeth; C. Methods of gum massage; D. Whitening mode for teeth whitening. This U-shaped toothbrush, you only need to take a gentle bite and then swing the toothbrush left and right 360 degrees to clean. Gently grit your teeth and brush your head, using sonic vibration to clean your teeth in all directions. You can apply makeup or wear clothes while brushing your teeth. This electric toothbrush will make your morning more efficient. When you use blue light whitening mode, you can completely free your hands. Color: White Product List: 1 Electric Toothbrush