Charge Last 15 Days - compatible with any power source with an auto shut off after a full charge and a low battery reminding. The long battery life is supported by USB charging. This electric toothbrush is convenient to use at home or travel - bring it on any trip with the easy to use adapter and USB cable. 5 High-Performance Brushing Modes to suit different conditions of teeth and gums.Take full care of your mouth and sensitive teeth. 55 gram extra-light weight designed, less than half of regular electric toothbrush. Light in hand but thorough cleaning with reduced noise, upgraded brushing experience than a regular electric toothbrush. 4 brush heads and a toothbrush heads hygienic protective cover included, to offer well-rounded protection on your brush heads hygienic and dust-free.