Features: (1) Display Function: Speed display, power-assisted gear display, power indicator, fault prompt, total mileage, single mileage, headlights and single driving time display. (2) Control/Setting Function: Power switch control, headlight switch control, 6Km/h boost control, wheel diameter setting, speed limit setting, meter sleep setting, backlight brightness setting, voltage setting. (3) Harness Description: Red (P+) meter power cord, Blue (VCC) electric door lock wire, Black (GND) negative wire, Green (RX) Meter data receiving, Yellow (TX) Meter data transmission Specifications: Voltage: 24-72V Plug: Waterproof Plug Mode: SL-SW900YB Application: E-Bike Motor Conversion Kit Material: Plastic colour: black Package Contents: 1 x SW900 LCD Display Control Kit 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. Electric Bicycle Speed Meter E-bike Display Control Speedometer Wired Speed Counter