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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!