Pre-Charged Pneumatic airguns are gaining in popularity like never before. The portable Umarex ReadyAir electronic compressor now stands at the ready to reliably get your air tank back up to pressure for more shooting. The ReadyAir is a high pressure air pump that doesn't need oil or a liquid filled radiator for cooling. The advanced design of this pump means there's less for you to worry about when filling. Just connect the power, set the digital control module for the pressure you require, and make the appropriate connections. Automatic overheating protection circuitry protects your investment so you'll keep enjoying fill after fill instead of worrying. Filling the Umarex Gauntlet's 13 cubic inch tank from zero to 3000 PSI takes only 7 minutes. Top-offs are made in about 4 minutes. Filling the Umarex Hammer takes approximately 26 minutes. Larger tanks will require more fill time, but with the peace of mind that the auto heat protection offers, you can fill as needed without worry. The ReadyAir can handle fills up to 4,500 PSI to keep hard hitting big bore's and air archery rifles like the Umarex AirSaber flinging arrows with authority.