General description The Car Truck 12V/24V 2 IN 1 Functions Digital Speedometer and Odometer Gauge is a versatile LCD instrument panel designed for vehicles. It features a speedometer and odometer in one compact unit, providing essential driving information at a glance. The gauge is waterproof and equipped with an alarm function for overspeed alerts. Technical specifications Working voltage: 12V/24V Item dimensions: 85mm x 85mm x 85mm Measuring range: Speed 0-160 km/h, Mileage 0-999999.9 km Overspeed alarm: Activates when driving speed ≥ set value (factory value: 80 km/h) Measurement accuracy: ±0.1% Working environment temperature: -20 °C to -50 °C Working environment humidity: 45% - 75% RH Magnetic pole pairs: Factory value is "8" Speed ratio: Factory value is 1:624 Installation Connect the black wire to the positive pole of the power supply (+) Connect the black and white wire to the negative pole of the power supply (-) For the odometer, connect the red wire to the + on the sensor,