2" 52mm 7-Color High-Speed Car Water Temperature, Oil Temperature, Oil Pressure, Air-Fuel Ratio, Boost, Voltmeter, EGT Meter, Tachometer RPM Gauge InstrumentFeatures: 1. High-speed stepper motor for quick response. 2. Alarm function with red flashing backlight when triggered. 3. Clear and bright adjustable 7-color LED backlight. 4. Lens-mounted button allows switching between desired backlight colors. Includes gauges for boost, water temperature, oil temperature, oil pressure, exhaust gas temperature (EGT), and tachometer with included sensors. Note: Air-fuel ratio gauge does not include sensor; must be purchased separately. Compatible only with narrow-band oxygen sensor. Sensor thread size is 1/8ZG. Item includes English installation instructions and premium racing-grade gauges. Specifications: - Tachometer: 010,000 RPM - Boost Gauge: -30 to +30 PSI - Water Temperature Gauge: 40C to 140C - Oil Temperature Gauge: 40C to 140C - Oil Pressure Gauge: 0100 PSI - Voltmeter: 818 V - Air-Fuel Ratio Gauge: 20:1 to 10:1 - Exhaust Gas Temperature Gauge: 300F to 1300F (approximately 150C to 700C) Note: Available with or without gauge mounts. Please select the correct option when ordering. After powering on the gauge, it is normal for the needle not to rest at zero initially. The gauge will operate correctly once powered. Compatible with 12-volt gasoline vehicles. Tachometer is compatible with 1- to 8-cylinder engines. Package Includes: - Tachometer - Boost Gauge (PSI) - Boost Tube - Water Temperature Gauge - Oil Temperature Gauge - Oil Pressure Gauge - Voltmeter - Air-Fuel Ratio Gauge - Exhaust Gas Temperature Gauge - Installation Accessories - English User Manual