Portable Dental Iimpactor Water Flosser Oral Irrigator USB Rechargeable Water Floss Jet Tooth Pick 4 Tip Mouth Washing Machine Parameter: Material: ABS (Housing ) + PC(Water Tank) Output: 3.7V / 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: 4 Hours