1. Wide Applications: Suitable for a full range of stepping instruments and can be used for engine generator sets, ships, construction machinery, agricultural machinery, car modification, and other applications. 2. IP67 Protection: IP67 waterproof and dustproof rating with curved glass and antifog design, providing reliable performance in harsh weather conditions. 3. Advantages: Low power consumption, long lifespan, and high accuracy. Features an ultra-wide working voltage design with a long-term operating range of 932V, capable of withstanding up to 36V. 4. Installation: The gauge has an installation diameter of 52mm (2.05in). Ensure at least 55mm (2.17in) of clearance behind the dashboard for proper fitment. 5. Quality Materials: Constructed with 316 stainless steel, PVC, and ABS, suitable for use in humid, alkaline, and corrosive environments. Spec: Item Type: Water Level Gauge Material: PVC + ABS + 316 Stainless Steel Light Color: 7-Color Backlight (Adjustable) Installation Diameter: 52mm (2.05in), with minimum 55mm (2.17in) space required behind the dashboard Working Voltage: 932V Working Current: 18mA Signal: 0190 Working Temperature: -30C to +75C Storage Temperature: -40C to +80C Applicable Scenarios: Universal for automobiles, engines, boats, RVs, yachts, engineering machinery, and similar equipment. How to Use: Black wire Negative Red wire Positive Blue wire Signal line Yellow wire Backlight line White wire Backlight adjustment Package List: 1 x Water Level Gauge 1 x Cap 1 x Manual