Features: * Contact charging More efficient and safe charging (with charging base) * Prompt function Rotation reminder, low battery reminder, charging reminder after brushing your teeth for 30s * DuPont bristles Select high-quality bristles to protect teeth and gums * Mode function Two tooth brushing modes (soft mode 16000 rpm, clean Mode 19000 rpm) + travel mode * Protective function Overcharge, overdischarge, short circuit protection function * Waterproof performance Toothbrush host IPX7 waterproof, charging base IPX5 waterproof * Brush your teeth regularly 2 minutes regular brushing (iot version can be customized), 30 seconds to remind * 30 days long battery life Brush your teeth twice a day, 2 minutes each time, can be used for more than 30 days * Memory function Remember the last brushing mode