Feature: Sonic dental vibration tools, the speed of grinding head can up to 30000 times per minute. High-speed sonic vibration helps to effectively remove tartar from the teeth, and massage the gums. Super bright LED light illuminates, allowing you to precisely clean your teeth. Comes with 4 grinding heads, heads are interchangeable, easy and convenient for use.   Review: Not fit for the following people: People with oral allergy People who recently had oral surgery, or in the oral treatment period People with severe bleeding gums Do not place it in the bathroom or damp places, keep away from children. It is only used to remove teeth from, not for other purposes. Do not clean this unit with alcoholic materials or disinfectant.   Specification: Vibration speed: 30000 times / min Grinding head: Totally 4 Power supply: 1 x AAA battery (Included) Size: Approx. 15 * 1.5 cm (L * D) 1 x Dent stain eraser host 4 x Grinding head 1 x User Manual (English / Chinese) 1 x Battery