Universal Car 40-140 Celsius Red/Blue LED Water Temp Temperature Gauge 2" 52mmCondition：100% Brand New and High Quality！！！Specification：-Power：DC 12V-Reads: 40-140℃ For Water-LED Color：Red / Blue-Diameter of installation：52mm / 2"-Diameter of display：49mm / 1.9“-Quantity：1 pcFeatures：-Dual Color display.（Red / Blue）-Smoke tint lens during the day，Clear and bright LED Display during the night.-Add a racing look and feel to your ride.-Durable.-Easy to install.Wiring Instructions:Red -- 12V accessory Power（+）Black -- Ground negative（-）White -- Engine accessory powerOrange -- Head light switch (12V switch power)Green -- Temp Sensor (connect to green wire from sensor)Note：You can choose Red or Blue by different Connection method( you can read the instructions).Professional installation is Highly Recommended.Package Included：1 x Water Temp Gauge1 x Mounting hardwareInstructions