Q:The product doesn't vibrate after turn it on? A: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 Q: Cannot be turned on, cannot be charged, doesn't vibrate, miing acceories A: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. Q:No effect after using the product? A: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. Electric Teeth Cleaner Household Dental Scaler Tooth Whitening and Cleaning Tartar Stains Remove Fresh Breath Oral Care USB Charging Features 1. Intelligent high-frequency sound waves can deeply clean teeth without hurting gums, effectively remove stubborn stains and tartar, and keep oral cavity comfortable and clean. 2. Equipped with two different types of dental cleaning heads, which can be used to remove tartar and dental stains on the tooth surface and between teeth, and make oral cleaning more comprehensive. 3. Built-in LED lighting can illuminate every corner of the oral cavity, which is convenient to observe the internal situation of the oral cavity. 4. Clean and whiten teeth efficiently, freshen breath, protect gums, improve oral problems and keep teeth healthy. 5. Helps to improve various oral problems, such as yellow teeth, black teeth, swollen gums, bleeding gums, tartar, dental plaque, halitosis, etc. 6. 10-minute timing protection: the dental scaler will automatically stop working after working for 10 minutes, so as to prevent the tip of the dental scaler from overheating and make your use safer. Specifications Material: ABS+ electroplating proce Color: white Type of interface: type-C Battery capacity: 450mA Rated power: 2.0W Rated voltage: 5V/1A Gear adjustment: third gear adjustment. Output frequency: 37KHZ3KHZ Rated voltage: 3.7V Rated current: 300MA Net weight: 0.081KG Product dimensions: 18.5*2.5*2CM Color box size: 19.8*7.8*3.8CM Packing List 1* Host 1* Teeth Cleaning Tip 1* Teeth Cleaning Head 1* Spanner 1* USB Charging Cable 1* English User Manual 1* Packing Box