BRupse Universal Car HUD Vehicle OBD-2 Fuel Icon Head Up Display LCD ReviewbP PP Rupse Universal Car HUD Vehicle OBD-2 Fuel Icon Head Up Display LCD PParameter value: show the value with the units of kilometers, miles and engine speed.POBDII port: connect the car and HUD.PFuel icon: flash when the fuel is not enough to drive 100km.PEngine failure: flash when vehicle's engine has problems.