1、Made of high-performance waterproof material, it is safe and durable. 2、ODO / TRIP function can open the black button on the back of the meter 3、A total of 7 colors, can be switched freely: when the odometer is in the ODO state, press the button for 3 seconds to switch the backlight color. 4、LCD digital display, oil volume measurement function, speed measurement function (0-10000RPM), speed measurement function (0-199KM / H) 5、Fit for:Compliant with most of 12V motors Features: Material: Made of high-performance waterproof material, it is safe and durable. Mileage display: ODO / TRIP function can open the black button on the back of the meter Backlight color: A total of 7 colors, can be switched freely: when the odometer is in the ODO state, press the button for 3 seconds to switch the backlight color. Multi-function display: LCD digital display, oil volume measurement function, speed measurement function (0-1000RPM), speed measurement function (0-199KM / H) For detailed usage, please refer to the instruction manual: Fit for:Compliant with most of 12V motors Installation Method: the black wire is connected to the positive electrode. The green wire is connected to the negative pole. Yellow black line speed signal line, Blue and white line oil gauge Specifications: Color: Black/Silver shell optional Material: electroplated iron (black) + surface Input Voltage: 12V Product size:6.8*6.8*7.4cm Package Size: 9 * 8.1 * 9cm / 3.54 * 3.19 * 3.54in Weight: 273g / 9.63oz Package List: 1*Tachometer Gauge 1*Tachometer Gauge