Features:Numbers and pointer clearly show the water temperature. _x005f_x000D_Blue LED light for easy reading in the darkness. _x005f_x000D_Measurement range is 20~120 Celsius Degree. _x005f_x000D_High sensitivity and easy operation. _x005f_x000D_Used to measure the water temperature of automobile. Specifications:_x005f_x000D_Material: Stainless Steel_x005f_x000D_Color: As Picture Shown_x005f_x000D_Measuring Range: 20-120_x005f_x000D_Input Voltage: 12 V DCSize: Approx. 8 x 7 x 6cm/3.15'' x 2.75'' x 2.36'' _x005f_x000D_Temperature Sensor Total Size(L*W): Approx. 41.68*12.83mm/1.64*0.51inTemperature Sensor Thread Size(Diam. * L): Approx. 9.46*9.8mm/0.37*0.39inWire Connection: Red for Positive, black for negative_x005f_x000D_Package Weight: Approx. 280g_x005f_x000D_Fitment: For 12 V autos and racing carsWiring Method:_x005f_x000D_A Set of 4 Wires:_x005f_x000D_1. Red wire connects + 12V power supply._x005f_x000D_2. White wire connects the headlight switch + 12V._x005f_x000D_3. Yellow wire connects the ignition switch._x005f_x000D_4. Black wire connect the storage battery or car shell._x005f_x000D_A Set of 2 Wires:_x005f_x000D_1. Green wire is signal line to connect the sensor._x005f_x000D_2. Black wire connects the ground wire._x005f_x000D_(The last wire is a spare one for similar item connection.)Back Sockets Instruction:_x005f_x000D_1. 2-pin socket links to external warning light(this item not includes the warning light)_x005f_x000D_2. 3-pin socket adapts to signal line._x005f_x000D_3. 4-pin socket is for battery connection. (When there are two 4-pin sockets, you only need to choose one to connect the power, and the rest socket is ready for other similar item without linking the power again)Package Included:_x005f_x000D_1 x Water Temperature Meter_x005f_x000D_1 x Bracket_x005f_x000D_1 x Sensor_x005f_x000D_Other Accessories 1Numbers and pointer clearly show the water temperature 2Blue LED light for easy reading in the darkness 3Measurement range is 20~120 Celsius Degree 4High sensitivity and easy operation 5Used to measure the water temperature of automobile