Many customers say "I can't see the electric shock, how is the effect?"
This is an ultrasonic type, and it cannot pass air or hand vibrations. But it may touch the teeth. When you receive it, try it on your teeth. You will feel its impact
Product name: Household scaler
Input voltage: 5V1A.
Output voltage: 3.7V/650MA
Appearance size: 27MM*223MM
Material: ABS/304 stainless steel
Dental scaler X1