No need to worry about batteries with this analog inflator gauge, filled with liquid (silicone oil) that provides optimal accuracy, pressure spike prevention, and a cushioned tick to optimize the lifespan of the mechanical parts inside the gauge. This also has a deflate button for when you overshoot the pressure. It comes with a 15 inch hose and a Straight Foot Air Chuck to minimize breakage to TPMS valves. The 360 swivel dial gauge is fitted with a rubber boot which protects it from corrosion, impacts, and shocks. INCLUDES: - Analog inflator gauge with rugged comfort-grip handle, shock-resistant protective rubber boot, deflate button, 15" hose, and straight foot inflation chuck. (Assembly required.) PRODUCT SPECIFICATIONS: Gauge: - Resolution: 1 PSI - Diameter: 2.75" - Units of measure: PSI (0-160), Bar (0-11) - Liquid filled: silicone based oil Hose: 1/4" ID x 15" EPDM rubber w/brass fittings Operating temperature: -4 to +158 degrees F (-20 to +70 C) Air inlet: 1/4" NPT female (Milton 727 plug sold separately) CONSTRUCTION: - No need to worry about batteries with this durable analog inflator gauge! - Protective rubber boot to shield against impacts. - Comfort molded nylon handle with coating is incredibly durable and ergonomic. - Steel inflator trigger with separate brass deflation button for quick fine tuning in case you go past your target pressure. - Solid brass fittings throughout provide long-lasting performance, with 1/4" NPT female air inlet (Milton 727 plug is recommended).