After the nozzle is extended into the oral cavity, the angle of the nozzle can be adjusted at will to match the cleaning of the area to be cleanedSpecification:Product name: Teeth cleanerProduct size: 70* 100*230mmCharging time: 4 hoursCharging mode: USBCharging voltage: 5V-1ABattery capacity: 1800mAh lithium batteryWater tank capacity: 180mlUse time: 1 month of continuous useWater pressure range: 60-120psiPacking list:1* Teeth cleanerThank you for your patronage and look forward to your next visit. If you are satisfied with the product, please let us know. We value the evaluation of each buyer. If you are not satisfied with our products or services, you can contact us at any time.