Product Description Material: PC + ABS Size: Appearance Size: 150*16*59 (mm) Quantity: 1 piece Package Contents: 1 * General HUD Head-up 1.GPS Speedometer: Collect real-time speedometer from GPS satellites, quickly lock satellites. Much more accurate than the OBD hud, especially when the car tire is replaced, then the engine speed is not accurate at all. Besides, GPS hud has the same working logic as speed radar. 2.Universal HUD: is compatible with all vehicles, cars, motorcycles, boats, trains and other assets. If you use it in a car, plug it into the car's USB port. If there is no USB port on the old car, then buy a car adapter for it or connect it to a power bank. 3.High quality screen: Stand-up display, projects the vehicle speed on the windshield, standalone display as video, green speed indicator, easy on the eyes. 4. Over seed alarm: Just press "up" or "down" to set it. When the overspeed alarm is active, it will beep three times to warn the motorist. If an overspeed alarm is not required, set it to an impossible speed, e.g. 999 MPH. 5.Easy to Use: No professional installation required, no wiring to VSS (vehicle speed signal). Compatible with all cars and trucks. Also compatible with motorcycle and bicycle.