Detailed Product Description Ultrasonic Toothbrush HSD-005The use of ultrasonic cavitation effect, which issued 1.7MHZ ultrasound allows the water molecules are rapidly compressed, a large number of bubble squeezed broken instantly , resulting in a strong penetration and refraction effects, so that the tartar peeling off the teeth, but the teeth There is no injury, and get neatness, whitening.1. ...