RaceTech 6 Gauge Set Features 6 Most Essential Gauges For Any Boat or Car’s Instrument Cluster – Includes GPS Function Speedometer & Tachometer – Volt, Fuel Level, Water Temperature & Oil Pressure Gauge. Measuring Range: Speedometer: 0 – 160 MPH, Tachometer: 0 – 10000 RPM, Volt: 8 – 18 V, Fuel Level: E – F & Resistance 240 – 33 ohms, Water Temperature: 100 – 250 °F, Oil Pressure: 0 – 150 PSI. It has Precision Movement & Extreme Accuracy, with IP-67 Waterproof, Rustproof, Anti-Fog, UV-Resistant and Power off Memory Functions. Convex Clear Lens, 316 Stainless Steel Bezel with ABS Plastic Housing. Gauges Requires 12 / 24 Volt Negative Ground Systems. Package Includes: GPS Sensor, Wiring Harness, Water Temp Sensor (Thread Size: 1/8 NPT), Oil Pressure Sensor (Thread Size: 1/8 NPT), Fuel Level Sender (240 – 33 ohms) & Installation Instructions.