1, This gauge work with High Quality Electronic Sensor. 2, only for 12V vehicles. 3, work without the control unit. 4, This is universal meter gauges that can fit any car. 5, Smoke Lens, It is dark when the Power is off. Range of Measurement1.0-290PSI (20BAR). You can switch BAR and PSI. State normally closed The diameter of 6.5 The CV value of 0.2 flow It is suitable for medium air, corrosive gas and so on. Sealed material EPDM The work pressure is less than 20 bar The leakage rate of 0 The response time of. 3 X Pressure Sensor. 1X suspension manifold valve.