Ultrasound will vibrate the working head contact with the teeth, breaking the surface of the dirt on the teeth to remove the dental calculus on the surface. Ultrasonic scaler use of mechanical effects, warm effect, to clean teeth, whitening teeth effect. The ultrasonic vibration frequency of 2000000 times per minute. 2 three adjustable frequency, do not need water. 3 automatic power-off protection design.Space metal cold working tips. 1 x Ultrasonic dental scaler. The item "Home Dental Intelligent Ultrasonic Air Scaler Handpiece Hygienist Tooth Cleaning" is in sale since Wednesday, July 4, 2018. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Handpieces & Instruments\Dental Curettes & Scalers".plus" and is located in Shenzhen. This item can be shipped worldwide.