<p>Wireless charging: Charging time is less than 90 minutes, can be used for more than 1 week for a full charge, it is really energy-saving and environmentally friendly. AI auto-save function: saves the user's habitual mode, and last time will automatically boot from the last used mode. Blu -ray whitening: Blu-ray turns on automatically when brushing teeth, sterilizes and disinfects the oral cavity, effectively removes tartar and plaque, and makes the oral cavity fresh and healthy. < p>IPX7 Waterproof:It features an IPX7 waterproof seal design, which is durable and portable. Just press and hold the button for 3 seconds, the blue light will turn on automatically and the sonic motor will start working immediately. You can cycle through the mode Press button toggle (4 levels) ) In any mode, press and hold the button for 3 seconds to turn off.</p>