Type:Electric Oral Irrigator Commodity Quality Certification:ce Origin:Mainland China Water tank volume:from 300 to 499 ml Number of operating modes:3 Number of nozzles:4 Water jet principle:Pulse Item Type:Oral Irrigator Power Source:Rechargeable Battery Certification:CE Power type:Rechargeable Age Group:Adults Jet pulsation frequency:from 1600 to 1999 imp/min Colour:White/Pink/Green Pump type:Diaphragm pump Product net weight:249g Material:ABS Power mode:Electric Rated voltage:DC3.7V Rated power:3.5W Use suggestions: 1. You had better close most of your mouth to avoid the water spray off. 2. Please choose the soft mode when you use it at the first time. 3. If your teeth are sensitive, please use warm water, it will be more comfortable. 4.Please follow the instructions. 5. Change new nozzles every 3 month is healthier Specifications: Water Tank:220ml Open Water Tank Work Mode:Normal, Soft,Pulse Water Pressure:30-130PSI Battery:100mAh Lithium Battery(Can be used for 60 minutes) Packing list: 1*Tooth punch 1 or 4 nozzles 1*USB cable 1*Instruction Note: - If you did not receive your order in time, please use AliExpress to contact me, I will provide you with effective solutions.Thanks for your understandings. - Because the time difference between countries, if sales person is not online,she will reply your email within 5-10 hours. Packing list: 1* Calculus Remover 2* Working Tips 1* Mini Wrench 1* Charger Cord 1* User Manual Warm prompt: Real ultrasonic scaler: 1.It will resonate when it touches a hard object, and it will automatically stop when it touches a soft gum. 2.No noise.So this ultrasonic scaler only works when it touches hard things such as teeth. If you use it on your skin, it won't work.There is no vibration of item body.