Feature:1. Good Effect: Electric toothbrush can penetrate between teeth and gum line for an excellent cleaning that removes 100% plaque, whitens teeth in two weeks and improves oral health.2. Waterproof: IPX7 waterproof design and toothbrush can be used for bathing and showering without worry about water getting into the charging port and shortening battery life.3. Simple Operation: Intelligent memory mode, smart electric toothbrush can timing 4 minutes, and with one button to start and adjust gears, which is convenient and easy to use.4. Low Noise: Super quiet design, the toothbrush has lower noise than ordinary toothbrush, and with new vibration technology does not hurt your gums, which is perfect fit for gums and teeth.5. 4 Gears: Adult electric toothbrush has 4 cleaning modes to effectively clean your oral hygiene, whether at home or traveling, which is very convenient and safe to use.How to Use:1. Insert the brush head into the swinging shaft carefully, and leave a certain space between the brush head and the main body to reserve working space for the normal work of the brush head.2. In order to prevent toothpaste splashing, take a small amount of toothpaste on the brush head before use (generally acoustic electric toothbrush saves more toothpaste than manual toothbrush).3. Wet the brush head and put it in yo