1.Portable dental scaler for household use /Simple, fast and efficient /Avoid the troubles of washing teeth to the hospital ,take care of your mouth anytime, anywhere. 2.Three work frequency ,suitable for different needs . 3.The highest frequency is 30,000 times / min, professional dental head, quick removal of smoke stains / tooth stains / calculus 4.Equipped with 2 professional cleaning heads, the cleaning head is detachable and easy to clean:tooth gap head and tooth surface head.Medical grade stainless steel 5.Creative LED lights illuminate every corner of your mouth for easy viewing of the location of the calculus and other problems in the mouth. 6.Whole body design ,beautiful and generous . 7.The battery is durable and practical . Attentions : Click the switch 2 times, the LED light is on. 1. Do not place products in direct sunlight . Do not put at -10℃ to +40℃ indoor environment . 2. The waterproof of this products is IPX6 , do not wash or soak with water. 3. It is not recommend for children to use this product .If necessary ,please use it under adult supervision to prevent children from being misled and injured . 4. The product contains batteries .Do not place product in a fire or high temperature container to avoid fire or explosion . 5. In case of product quality problem ,please do not disassemble yourself .