?Fading Reminder Bristles?The package includes 2 * high-density brush heads and 1 * bristle protective cover. The blue bristles remind you to replace the brush head when it fades to white. Dentist Advice - brush head should be replaced every 3 months for best results. Manasco Sonic Electric Toothbrush is the ideal choice for you and your kids. ?Long Lasting 30 Day Battery Life?4 hours full charge can last up to 30 days of normal usage (2 times per day). The Low battery indicator reminds you to recharge and automatically cuts off power after a full charge. The high-density battery supported by USB inductive charging is compatible with any power source. Ideally to use at home or travel. ?Smart Notification Reminder?Built-in 2-minute smart timer to develop good brushing habits - 30 seconds interval reminding you to change brushing area, and automatically shut down in 2 minutes later, which is recommended as a correct brushing way. IPX7 Waterproof to be used in a bathtub or shower. ?Superior Clean Modes?Supports 4 different modes based on your specific oral care goals: Cleaning, Whitening, Polishing, and Gum Care. With a W-shape soft bristle brush head designed especially for sensitive teeth and gums, it brings you a whole new brushing experience, and helps prevent cavities as well as improving gum health; Built-in Pressure Sensor help protects teeth and gums from excess brushing pressure. ?Powerful Sonic Technology?With 38000 micro-brush/min powerful sonic dynamic cleaning, HANASCO Upgraded Electric Toothbrush can drive fluid deep between your teeth and along the gum line for exceptional cleaning, effectively whitening your teeth and improving your oral health, way better than an ordinary electric toothbrush.