?CONTACT US?Login your account > choose "Your orders" > find the order ID > click "Contact seller". ?60 days battery life, Wireless Charge, IPX7 Waterproof?- One 10 hours full charge last 60 days of normal usage (2 times per day), the largest battery capacity on the market with low battery reminding and automatically cuts off power after full charge. Ultra fast wireless charging (forget cheap USB charging). Also, IPX7 waterproof to be used at bath and shower. No worry about the water would enter the charge ports to short the battery life, More safer than USB charger. ?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. ?5 HIGH-PERFORMANCE BRUSHING MODES?- Clean(gentle), White(strong), Polish(strong invert frequency), Milder(gentle invert frequency) and Sensitive(soft) to suit different conditions of teeth of gums, so you can choose different modes according to your preferences and dentist's recommendations. ?12 Replacement brush heads, "W" shape design?- Comes with 12 replacement brush heads to avoid order new replacement brush heads frequently. The bristles are made with"W" shape design to suit teeth topography for thorough cleaning of gums and hard to reach areas. Notice: The brush heads will remind you to replace your brush head through blue indicator bristles. Gentle on your gum and blue indicator bristles fade in color to let you know when it's time to replace the brush head. ?8 Kinds of Intelligent Technology?- 2022 New Upgraded Electric Toothbrush, Using the Latest Sonic Technology, 31000 Times Per Minute High-Frequency vibration, wireless intelligent fast charging 8 hours can standby 60 days, IPX7 waterproof, 5 modes of intelligent memory, record your every brushing mode. Scientific toothbrushing built-in 2-minute intelligent timer, 30 seconds to change the zone to remind brushing a comprehensive and effective, ultra-low noise makes brushing a pleasure.