Digital Car Water Temperature Gauge, Coolant Temperature Sensor with Blue LED Display for 12V Racing Vehicles

[Automatic Compatibility] Specially designed to measure water temperature in automobiles, ensuring accurate results. [Clear Display] Numbers and pointer clearly show the water temperature for easy reading. [Simple to Use] High sensitivity and easy operation make water temperature measurement simple. [Wide Range] Measuring range of 20~120 degrees Celsius accommodates various temperature readings. [Bright LED] Blue LED light illuminates for effortless reading in the dark or low-light conditions. SPEC: Features: Numbers and pointer clearly show the water temperature. Blue LED light for easy reading in the dark. Measuring range is 20 to 120 degrees Celsius. High sensitivity and easy operation. Used for measuring automotive water temperature. Specifications: Material: Stainless steel Color: As shown in the picture Measuring range: 20-120℃ Size: Approx. 8 x 7 x 6cm / 3.15'' x 2.75'' x 2.36'' Temperature Sensor Overall Size (L * W): Approx. 41.68 * 12.83 mm / 1.64 * 0.51 inch Temperature Sensor Wire Size (diam. * L): Approx. 9.46 * 9.8 mm / 0.37 * 0.39 inch Wire Connection: Red for positive, black for negative Package Weight: Approx. 280g Fitment: For 12V cars and racing cars Wiring Method: A set of 4 wires: 1. Red wire connects to +12V power supply. 2. White wire connects to the headlight switch +12V. 3. Yellow wire connects to the ignition switch. 4. Black wire connects to the storage battery or the car's chassis. A set of 2 wires: 1. The green wire is the signal line for connecting to the sensor. 2. The black wire connects to the ground wire. (The last wire is a spare for connecting a similar item.) Rear socket instructions: 1. Connect the 2-pin socket to the external warning light (this item does not include the warning light). 2. The 3-pin socket fits the signal line. 3. The 4-pin socket is