High Quality Charging Port Cover, IPX7 waterproof. Easier to Use and Efficient: The advanced sonic motor with stable 42000 high-efficiency vibrations frequency Per Minute and the professional sonic electric toothbrush waves better for cleaning hard-to-reach plaque and bacteria. Gentle yet effective to whiten teeth: The rechargeable electronic toothbrush for adults offers 6 effective tooth brushing modes to suit your different oral care needs. Cleaning Mode for daily dental care and sensitive mode for fresh user or sensitive teeth. Innovative Handle and Smart Timer: 2 minutes smart vibration timer,notifies you every 30s, guiding to move to another quadrant. Water flow curve texture design: comfortable and non-slip. Smart Vibrating Notification Timer- Built in smart timer control, 30 seconds interval reminding you to move to the next quadrant of your mouth, and totally in 2 minutes(4 quadrants), which is highly recommended by professional dentists, as a correct brushing way. 60 days battery life, USB Charge, IPX7 Waterproof- One 3 hours full charge last 60 days of normal usage (2 times per day), IPX7 waterproof to be used at bath and shower. No worry about the water would enter the charge ports to short the battery life. 4 Replacement Brush Heads Comes with replacement brush heads to avoid order new replacement brush heads frequently. The bristles are made with DUPONT nylon, "W" shape design to suit teeth topography for thorough cleaning of gums and hard to reach areas. Notice: Gentle on your gum and blue indicator bristles fade in color to let you know when it's time to replace the brush head.