ITEM NAME:Universal Motorcycle Instrument Speedometer Odometer Tachometer Gauge 12V Descriptio n material: metal Color: silver Size: about 9*9*9cm Product size: about 9.3*7*6.1cm Weight: 0.23kg Working voltage: DC12V indicator: blue LED (speed) / red LED (oil) The installation and debugging method of the tachometer: 1, the positive and negative poles are connected to the power supply, 2, open the electric door switch, the tachometer display is 0, then the signal line is touched to the positive pole of the power supply, the display will have a digital change, indicating normal operation. 3, connect the signal line, start the car, you can display the speed. 4, connect the signal line (please note: can not be used with the original fuel gauge), fill up the oil, slowly adjust the potentiometer so that the LED light is just all bright, and then adjust the potentiometer slightly after the oil is used up The light is only red, it will be fine. Features: 100% brand new, high quality Practical and durable Made of high quality material, more durable. Product list: 1 motorcycle meter odometer High quality buy, happy buyï ¼ Universal Motorcycle Instrument Speedometer Odometer Tachometer Gauge 12V.We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted. 3, connect the signal line, start the car, you can display the speed. We'd like to settle any problem in a friendly manner.