HUD Function :This product has the functions of vehicle speed, voltage, water temperature, rotational speed, fuel consumption, single driving time, single driving mileage and so on. HUD Description :Automotive LCD instrumentation, including OBD2+GPS two systems in one, bringing a new sense of experience for your driving. Automatic Brightness Adjustment : Built-in light sensor automatically adjusts brightness according to changes in external brightness. It can be displayed clearly even when the brightness is increased in sunlight. Reduce the brightness at night to avoid glare. You can obtain : P17 main unit,OBD cable, USB cable,Suction cup bracket (360 degrees) Double-sided tape nstruction Manual and our friendly customer service and after-sales guarantee.