#26FN Brand New, Unused Ultrasonic Stain Cleaner Yinuaseus Type-C Rechargeable Portable Tooth Cleaner, 6 Modes Adjustable, 4 Replacement Metal Heads, IPX6 Waterproof, LED Light Cleaning Kit with Dust Cap, Japanese Instruction Manual Included Color: White Safety Protection Design After turning on the product, you cannot visually observe the vibration frequency. The product will clearly vibrate only after touching teeth, ceramics, or metal products. After turning on the power, ultrasonic vibration will not occur when touching gums or soft objects. Ultrasonic vibration will occur after touching teeth or hard objects, and you will clearly feel the product working. A "zoo" sound will be heard on the contact surface. This product automatically turns off after operating for 10 minutes. Please use it with confidence. 6 Modes Adjustable Equipped with 6 modes (Massage/Polish/Nurse/Skin whitening/Clean/Descale) that allow you to adjust the strength according to the condition of your gums, and you can switch freely with one button. IPX6 Waterproof Specification Water can be used to clean the cleaning head and the product body. However, do not immerse the product in water. Avoid rinsing the charging port with water. There is a cover on the bottom to prevent water from entering the charging port. Dry the surface of the device after cleaning! 【Type-C Charging and Automatic Power Off】The product automatically turns off after operating for 10 minutes. Press the switch briefly for 1-2 seconds to start the product.