Portable Cordless Teeth cleaning mechanical device Travel Oral Irrigator USB Rechargeable three Modes 4 Jet Tips IPX7 Mouth Washing MachineParameter: Material: ABS (Housing ) + PC(Water Tank) Output: 3 / 5W Water Tank: 220ml Pulse Frequency: 1200 Times / Min Water Pressure Range: 30-110 PSI Battery: Rechargeable 1200mAh Lithium Battery Charging Mode: USB Charging Working Time Of Fully Charged: four Hours