Make sure that your controller has a LIN Meter function or phase velocity line. Our /LB controller with this function can be directly plugged in. Please Check if this display function is suitable . Two kinds of display speed signals Phase speed signal: The inst ent interface does not display the gear position, and does not display the fault function. The speed is converted according to the output voltage of the controller, and there is an error. LIN signal: The inst ent interface displays the gear position and displays the fault function. The speed is subject to the signal of the controller, and the speed display is relatively stable. recommend! Function Three gears: 1, 2, and 3. If the controller has LIN communication, three gears can be displayed, other methods such as phase speed not be displayed. Fault light: including main fault light, motor fault, controller fault, throttle fault If the controller has LIN communication, the fault light can be displayed, other methods such as phase speed not be displayed. Headlight: The brown wire connects to your headlight. Turn left: the orange line connects to the left light. Turn right: the light blue line connected to the right light. Speed: Maximum. 99kmh (bulk order can be changed to mph) TotalMeilage: cumulative display. Electricity: A total of five bars of battery display, depending on your overvoltage and undervoltage. If the voltage data is incorrect, there be some errors in the battery display. Charging warning: When the battery is low, the charging warning light be on. Voltage exchange: 60V, 48V and 72V. If your electric vehicle is 60V, the conversion line connection is dedicated for 60V. If your electric car is 48V or 72V, the conversion line is disconnected, and the two voltages of 48V and 72V arecommon. Colour: black Material: plastic Package Contents: 1 * Electric bike speedometer