<p>describe:</p> <p>The number of bristles has increased from 768 in the third generation to 1908. In order to better brush teeth and massage gums, external testing also added a brush head.</p> <p>Four modes of one-key operation:</p> <p>A. Powerful mode, powerful brushing;</p> <p>B. Moderate mode, comfortable to brush teeth;</p> <p>C. Gum massage method;</p> <p>D. Whitening mode for teeth whitening. With this U-shaped toothbrush, you only need to bite it gently and then swing it left and right to clean the toothbrush 360 degrees.</p> <p>Gently bite the brush head and use sonic vibrations to clean your teeth. Full range of teeth. You can brush your teeth while putting on makeup or getting dressed.</p> <p>This electric toothbrush will make your mornings more efficient. When you use blue light whitening mode, you can completely free your hands.</p> <p>Package contents: 1 piece toothbrush</p>