GPS Speedometers: Collecting speedometer from GPS satellites in real time, satellites lock in quickly. Much more accurate than the OBD HUD especially when the car tire is replaced, then engine speed is not accurate at all. Besides, GPS HUD has the same working logic as speed radar.
Universal HUD: Compatible with all vehicles, cars, motorcycles, boats, trains, and other assets… If you use it inside a car, plug it into the car USB port; If no USB port on the old car, then buy a car adaptor for it, or plug it into a power bank.
High-Quality Wide Screen: Stand-up display, Projects vehicle speed on the windshield, stand-alone display as the video shows, green color speed display, easy on your eye.
Over-Speed Alarm: The default setting is 120KM/H or 120MPH. Just need to press the “up” or “down” to adjust it. When an over-speed alarm is active, it will beep 3 times to alert the car driver. If no need over-speed alert, adjust it to an impossible speed eg 999MPH.
Easy to Use: Simple device, and good English instructions, get it to use within 5 minutes. No need for professional installation, no wiring needed to the VSS (vehicle speed signal). Compatible with all cars and trucks, also Compatible with motorcycle and bicycle.