TOOGOO(R) Car HUD Vehicle-mounted Head Up Display System OBD Overspeed Warning Fuel Consumption Automatically adapt to the automobile models with OBD II (Bus Automatic Diagnostic System). Accurate screen digital speed, graphics speed also are shown. Vehicle speed, engine speed, water temperature, fuel consumption can be read easily. Automatic soft-off feature after 10 seconds to save power. Natural light is produced by the unique polarized lens design. Alarm mode of single or four stages can be chosen as you wish. Remind driver to shift gear when necessary. Record cars driving over the maximum speed. Adjust the brightness mode automatically or manually so that the driving is not dazzling.