Rechargeable Battery: Built-in battery support long runtime on a single charge. So you don't have to recharge frequently and don't need to replace batteries any more. Try it, and you will love it. Multiple Replaceable Heads:Comes with 2 kinds of cleaning heads. It could help solve different teeth problems and remove different kind of stains. Safe And Easy to Use: The heads are made of high-quality stainless steel. The slip-resistant silicone handle and auxiliary LED light are all to ensure safe use. The cleaning head is detachable and washable, so you can rinse under tap to keep clean. Teeth Cleaning Kit: Come with 3 adjustable effective modes and 2 heads to meet your different cleaning needs.