Features: The tartar remover for teeth comes with 2 stainless steel replacement heads for different dental needs. Try it on a soft mode first so you can get used to the feeling. Then slowly increase the intensity to find the level that works best for you. It is useful to help you easily to clean tartar, coffee, wine, tea-stains, plaque, crush stubborn dental calculus, and other dental problems. The dental calculus remover is activated only when the cleaning for head touches teeth or hard objects, and it will stop vibrate automatically when it touches soft gums. A dental kit doesn'for t eliminate the need to floss as it serves a different purpose. Specifications: Material: ABS Size: Approx.19x2.5x2.5cm/7.48x0.98x0.98in Type: Ordinary Set / Upgrade Set(with 4 Dental Scalers) Operating Frequency: 37KHZ+/-3KHZ Rated-Current: 0.15A Rated-Power: 0.8W Working Temperature: 0-40℃ Charging Time: 2.5h Service Life: 8000H Battery Capacity: 500mAh Package Includes: 1 Set Home-use Dental Tools note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.