1. Durable and wear-resistant. 2. Easy to install, plug and play. 3. Input voltage: 12V 4. Suitable models: 12V Modified cars 5. The water temperature gauge measures the water temperature of 40~140 degrees Celsius and is used to measure the water temperature of the vehicle tank. 6. Wiring method: red line connects to ignition switch 12V (+); yellow line connects to ignition switch 12V (+); black line connects to battery (power supply) negative "-"; green line connects to water temperature sensor.