[Full Charging for 45 Days Using] This Sonic Electric Toothbrush can run for 45 days after eight hours of charging.The lightweight body design and USB charging interface make this electric toothbrush the best choice for travel-portable and convenient. Great for carrying and traveling. Also one of the best choices as a gift. Please kindly know that the package DO NOT include the AC Adaptor. [IPX7 Waterproof and Light Weight Design] Rechargeable electric toothbrush with IPX7 rated waterproof design, so you can safely use the electric toothbrush in the bath or shower. No worry about the water would enter the charge ports to short the battery life. Also,when in use this electric toothbrush, you can feel the comfort and lightness and experience the details of the electric toothbrush design. [2 Minutes Smart Timer] The electric toothbrush built in smart timer control,pause every 30 seconds to remind the user to change the cleaning area. 2 minutes auto shut off as the brush time recommend by dentist. The rechargeable electric toothbrush can let you get the sweetest smile in the shortest time. [Powerful Sonic Cleaning Effect] This electric toothbrush with the latest sonic technology delivers 40,000 strokes per minute.The sonic technology allows the fluid to gently clean between the teeth and the gum line, the Initio electric toothbrush cleaning effect is 10 times that of manual toothbrushes and 3 times that of ordinary electric toothbrushes. People who smoke or drink tea all the year round can also get brighter teeth by sticking with this electric toothbrush. [5 High-Performance Brushing Modes] Electric toothbrush with 5 modes of intelligence for adults and kids,including White, Clean, Sensitive, Polish, Massage to suit different conditions of teeth of gums. You can choose different modes for your electric toothbrush according to your gum conditions and preferences.