USB Charging for 30 Days Use - One 4 hours full charge last 30 days of normal Use (2 times per day), with low battery reminding and automatically cuts off power after full charge. IPX7 waterproof that whole body washable, enjoy brushing your teeth in the shower. Interdental Toothbrush Head - helps to prevent gum disease by getting rid of pieces of food and plaque from between your teeth. SATISFACTION GUARANTEED - Oraimo provide One Year Warranty. If you have any questions about our products, please feel free to contact us. The following replacement brush heads fit our electric toothbrushes: :B088P3G3KC and B07FRBZBXS. 3 Optional Brushing Modes - Clean, Soft and Massage, customize your experience according to your teeth condition, keep your teeth healthy. Great Electric Toothbrush for Adults and Kids - Oraimo Ultrasonic toothbrush with soft Dupont Nylon Bristles has a large contact area, especially suitable for adults and Kids! Strongly removes stains and plaques with 40,000 vibrations per minute powerful Motor.