1、Multifunction: Car HUD can not only display the driving speed of the vehicle in time, but also display the driving direction, single driving time and single driving mileage through the compass. 2、High Accuracy: Speed and compass data come from satellites and are timely and accurate. In particular, the direction of the compass is the driving direction and is not affected by the magnetic field. 3、Large Green Font: 9in large screen display, easier to read. The large, green font will make the driver more comfortable and protect the driver's eyes, especially suitable for long distance driving. 4、Alarm Function: With overspeeding alarm and fatigue driving alarm to ensure your safe travel. The default setting is 120KM/H or 120MPH. You can adjust it according to your needs. 5、Suitable for All Vehicles: The data comes from GPS satellites, so the HUD is compatible with all vehicles including cars, trucks, pickups, suvs, scooters, trains, motorcycles, bikes, boats.