1. 2 - inch, 52 - mm, 7 - color high - speed automotive water temperature, oil temperature, oil pressure, air - fuel ratio, boost pressure, voltmeter, EGT gauge, tachometer RPM automotive instruments - Features: - 1. Equipped with a fast stepper motor, providing rapid response. - 2. Has an alarm function, and the red light will flash. - 3. Clear and bright adjustable LED lighting (check the product page). 2. Boost pressure gauge, water temperature gauge, oil temperature gauge, oil pressure gauge, exhaust gas temperature gauge come with sensors. (Note: The air - fuel ratio gauge without a sensor needs to be purchased separately. It is only suitable for narrow - band oxygen sensors.) The sensor thread is 1/8ZG. Installation instructions are included in the product. 3. High - end tachometer: 0 - 1000 rpm. - Water temperature gauge: - 30 - 30 PSI, 40 - 140℃. - Oil temperature gauge: 40 - 140℃. - Oil pressure gauge: 40 - 140℃, 0 - 100 PSI. - Voltmeter: 8 - 18 V. - Air - fuel ratio gauge: 20:1 ~ 10:1. - Exhaust temperature gauge: 3 - 13×100 ℃. 4. Note: (The instrument and instrument stand are optional. Please do not make a wrong purchase.) When you receive the instrument, it is normal for the pointer not to show 0. It will work normally after power - on. 5. Accessories: Suitable for 12 - volt gasoline vehicles. (The tachometer is only suitable for 1 - 8 cylinder vehicles.) 6. Product pictures and contents in the package (see the picture below): Tachometer, boost pressure gauge PSI, boost pressure gauge rod, water temperature gauge, oil temperature gauge, oil pressure gauge, voltmeter, air - fuel ratio gauge, exhaust temperature gauge.