The Smile U1 is designed to take the hassle out of brushing your teeth, putting the style in instead. The super-long battery capacity means it works for up to 6 months on a single charge. The portable travel case and USB charging cable mean you can charge it from your computer, power bank or any other source. The 30-second zone change reminder helps you stick to the recommended brushing time, while the touch-sensitive wake and mode memory features activate the brush as soon as you pick it up. The head is made of certified food-contact material and DuPont bristles, while the motor shaft in surgical stainless steel does not rust even after prolonged immersion. The handle features environmental-friendly plastic that provides excellent finish and sense of touch.