Rechargeable Design & Safety Lock: The dental polisher features a USB charging cable with a Type-C charging port, offering easy charging via rechargeable battery, laptop, socket, or car. After just over 2 hours of charging, it provides more than 20 times. To prevent over-cleaning of your teeth, the device is equipped with a safety lock design that automatically shuts off the power after 3 minutes of use. To continue using it, simply restart the device IPX6 Waterproof: This teeth polishing kit is made from high-quality ABS material and features an IPX6 waterproof design, allowing for safe and easy cleaning under running water (please avoid submerging it). The waterproof feature ensures you can easily rinse the device after each use to keep it clean. Please note that after each cleaning, the brush head should be kept dry in a ventilated place to prevent rusting Cleaning & Polishing: This tooth polisher set includes 3 cleaning brush heads: the silicone friction brush removes stubborn stains, while the flattop and pointed brushes clean surface residue and dental stain. It also includes 2 polishing heads—the Polish Cup Brush and Umbrella Polishing Brush—which smooth the inner and outer tooth surfaces. These interchangeable heads help address different oral needs and, when used with polishing paste, can aid in preventing cavities 4 Adjustable Cleaning Modes:This teeth polisher offers 4 cleaning modes: Soft, Normal, Middle, and Strong. You can choose the right cleaning speed for your gums and protect them while effectively cleaning your teeth. It is perfect for all kinds of oral conditions, allowing your family to enjoy a comfortable cleaning experience and display a confident smile. If it's your first time using a teeth grinder, start with the "Soft" mode to get accustomed to it Multi-occasional care: This tooth polisher has a built-in LED light that helps you see clearly, making it easier to clean every corner of your mouth without missing a corner. Whether you’re in a dim bathroom or just need better visibility, the light makes cleaning your teeth simple and effective. It also comes with a stylish box that’s easy to carry, so you can oral care at any time