Dual-gauge design: Clear dial with highly readable markings directly displays pressure and leak rate, with measurement ranges of 0-100 psi (0-7 bar) and 0-100% (accuracy: 0.5%) Instrument Details: 18-inch rubber hose, pressure regulator, air nozzle, aluminum alloy body; alloy + plastic pressure adjustment knob (pull out to use, push in to lock); quick-connect fitting for threadless installation; extension rod connects to long/short hoses for extended reach Accessory Details: Four adaptersM141.25, M181.5, M101, M121.25, the deep thread design is anti-slip and durable. Additionally, it comes with two rubber extension hoses of different lengths, two universal push-fit connectors, and one M14 extension rod Fault detection: Connecting the air compressor ( provided by the user ) can detect piston ring wear, valve failure, cylinder wall cracks, cylinder gasket damage and other common engine problems Field of application: All aluminum + rubber material, straight/bend quick-connect fittings are compatible with almost all gasoline engines, meeting the needs of efficient inspection in auto repair scenarios