Widely used for car, truck, yacht, boat, and marine applications. Self-calibration at start-up ensures optimal, smart, and effortless operation. Features an LED digital screen. Test range: 0-1.00Mpa; gauge flashes as an alarm when oil pressure is ≤0.08Mpa. Oil pressure sensor: 1/8NPT. The red wire connects to the positive pole of the power supply, and the black wire connects to the negative pole. Gauge installation diameter: Φ52mm (2 inch). Note: Installation guide not included; professional installation is strongly recommended. Please verify compatibility before purchase. Material: plastic. Color: as shown. Package contents: 1 x oil pressure sensor. The package includes only the items listed above; other products are not included. Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3cm due to manual measurement.