Features: Made of iron and plastic material, no easy to rust, durable for long time use. 7 color LED digital display, high accuracy data reading. High accuracy and easy operation, enhance the characteristic to your car. Comes with mounting accessory for easy installation. Universal, fit for 2in/52mm diameter water temp meter. Specification: Material: Iron, Plastic Size: Approx. 57*54mm / 2.2*2.1in Color: White, Black Voltage: 12V Digital: 40-120℃ Fiment: Fit for 2"/52mm Diameter Gauge Wire connection: Red: 12v ignition switch Green: temperature sensor (blue line) Yellow: 12v instrument light / 12v ignition switch Black: vehicle floor Package List: 1 * Water Temp Meter 1 * Sensor 1 * Cable (Includes mounting accessory) Note: No installation included. Professional installation is Highly Recommended. As you know, different computers display colors in different ways, and the actual project color may be slightly different from the image below. Please allow 0.5-1in error due to manual measurement. Thanks for your understanding.