- Type-c charging, a one-time charge only for 200 days of use, twice a day for two minutes each time. ♦ Suitable for people with a bad experience, removes 100% more plaque than a handmade toothbrush in hard-to-reach areas - Brush your teeth for two minutes, with automatic reminders every 30 seconds to change brush areas. - High vibration frequencies reach 37,200 vibrations per minute, and the vibration focuses on the brush head, limiting the vibration of the handle, and takes care of the gums while whitening you. - Four brushes each one is enough