Made of high quality material, and practical to use. New round color screen electric, digital lcd handle Function display: battery level, voltage, speed, Hall speed measurement Phase line Speed measurement Speed display Mileage LCD instrument display: speed - range power - voltage Voltage and mileage are in the same display position. the M key to switch the display content of mileage and voltage 22mm installation diameter Mileage display The longer the riding distance, the larger the displayed kilometer value good compatibility for scooter,balanced, ebike, electric bike easy to use and install,Good compatibility Type:3pin plug: Red power supply positive line Black power supply negative line Green line speed measurement line (connected to the motor Hall line) Colour:Black Material:Plastic Size: 16x10x5cm Package Contents: 1 * electric bicycles Display Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.