Specifications:

• The product adopts ultrasonic technology, and the product itself won't vibrate after it is turned on.You need to install the cleaning head, use a small wrench to tighten the cleaning head.When the product touches hard objects such as wrenches, teeth, etc, it will make a sound, indicating that the product is vibrating.No sound or vibration when the product touches soft objects such as skin and gums
• When you encounter similar problems, please don't open dispute and don't give bad feedbck in advance.Please contact us Immediately, if the product has quality problems, we promise to resend a new product for you.
• The vibration frequency of our product is within the safe range and will not cause damage to tooth enamel.Please charge the product for 2 hours to maintain sufficient power.Some buyers do not have a serious plaque problem and it is hard to see it by eyes.There is a lot of saliva in the mouth, and the shed plaque may have mixed with the saliva.Please brush your teeth after use.Keep using it and your teeth will be very clean.

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