Built-in Rechargeable Battery: The toothbrush sterilizer case has a built-in rechargeable battery that does not require you to purchase additional batteries. Using the USB-C charging port, it can be fully in about 2 hours. A full charge lasts about 15 days. Easy to Use: Put the toothbrush in the toothbrush box and close the cover, press the switch to turn on the for 3 minutes, then the toothbrush cleaner auto turn off when finished. When open the cover toothbrush UV light auto stop working. Designed with ventilation and drainage port, avoid toothbrushes that become moldy and harbor in an airtight, humid environment(Shake off the excess water from the toothbrush before putting it in). Effect 99.9%: Our UV toothbrush uses UVC-LED to kill on your toothbrush to keep your toothbrush clean and maintain good oral health. A Good Gift: The toothbrush and holder is made of high-quality ABS material, elegant appearance, using gift box packaging, a good choice to give as a gift to relatives and friends.