1. Multifunctional HUD: This HUD can not only display the vehicle's driving speed in time, but also display the driving direction, single driving time, and single driving distance via the compass. 2. High Accuracy: Accurately searches for the number of satellites, speed, and compass data from satellites, quickly and accurately. Especially, the compass direction is not affected by the magnetic field. 3. Alarm Function: Overspeed alarm and fatigue driving alarm to ensure your safe journey. The default setting is 120KM/H or 120MPH. You can adjust it according to your needs. 4. 3-inch Screen: Large screen display, easier and more convenient to read. Large and green text, the green light protects the driver's eyes, especially suitable for long-distance driving. 5. Universal Fit: Collects speed from GPS satellites, not related to car engine, so it is compatible with all vehicles, including cars, trucks, pickup trucks, SUVs, mopeds, trains, bicycles, boats. Our customer service team consists of experienced, professional, and responsible staff. They will do their utmost to solve your problems and convey our sincerity and commitment. By choosing our products, you choose safety and peace of mind.