No Electrical Source NecessaryEasy-to-Use Tire Drying & Purging SystemVacuum & Fill Four Tires Simultaneously in MinutesVacuum Gauge IncludedCompact, Easily Transported SystemTransport on Supplied Cart or Mount in TrailerUses Compressed Air or NitrogenControls Stagger GrowthReduces Tire Wear & Limits Pressure GainEliminates Tire Glazing