Specification: Model: XLSF-A1 Input Voltage: 110V-220V Input Current: 110mA – 300mA Operating Temperature: -4? -140? (-20? -60?) Air Supply Flow: First Gear: 62 L/min Second Gear: 74 L/min Charging Time: 3 hours Continuous Working Time: Approx 7 hours Working Lifetime:? 5000h Air Pipe Length: 1m/ 3.