(3) Harness Description: Red (P+) meter power cord; (VCC) electric door lock wire; Black (GND) negative wire; Green () Meter data receiving; Yellow (TX) Meter data transmission Features: (1) Display: Speed display, power-assisted display, power indicator, fault prompt, mileage, single mileage, headlights and single driving time display. (2) Control/Setting: Power switch control, switch control, 6Km/h boost control, wheel diameter setting, speed limit setting, meter sleep setting, backlight brightness setting, setting. (4) Meter Setting: Long press the up and down buttons of the meter to enter the meter.