Get ready for ReadyAir Gen2. The 2nd Generation of the ReadyAir high pressure air pump puts out up to 4,500 PSI of pressure and ideally used for filling the tank on your PCP air rifle. This new ReadyAir Gen 2 features a much smaller footprint, lighter weight construction, and improved programmable digital read-out The ReadyAir Gen 2 still offers shooters the flexibility to fill up while affield using 12v DC power direct to vehicle's battery or through 110v AC power from your standard wall outlet. Just program in your set cut-off pressure, hook the fill hose to the airgun's tank and power up. This pump will fill a 24 Cubic Inch tank from empty to 4,500 PSI in 18 minutes. Refills and smaller tanks will take mch less time.