High-frequency sonic vibration, deep cleaning and more protective gums 38000 times/min sonic vibration: through high-frequency vibration to form the flow of cleaning power, deep into the teeth, gum grooves, removing plaque and food debris, cleaning power increased by 3 times. Intelligent Vibration Reduction and Gum Protection: Built-in pressure sensing chip automatically reduces the frequency when brushing too hard, avoiding bleeding gums and providing peace of mind for sensitive gums. 5 cleaning modes to meet the needs of the whole family Cleaning Mode: daily deep cleaning Sensitive Mode: gentle gum protection, suitable for sensitive gums Whitening Mode: high-frequency polishing, lighten the stains Polishing Mode: rapid brightening of the teeth Massage Mode: gentle massage of the gums, promote blood circulation Ultra-long battery life + IPX7 waterproof, worry-free traveling 180 days ultra-long battery life: Type-C fast charging, 6 hours charging, half a year of battery life, say goodbye to frequent charging troubles. IPX7 waterproof: full-body washable design, can be used without worry when showering or taking a bath, and it's more convenient to rinse directly after brushing