Product Description Material: PC+ABS Size: Appearance size: 150*16*59 (mm) Quantity: 1pcs Package content: 1* automotive general HUD head-up display 1.GPS Speedometerscollecting 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. 2.Universal HUDis compatible with all vehicles, car, motorcycle, boat, train and other assets If use it inside a car, plug it to the car USB port; If no USB port on the old car, then buy a car adaptor for it, or plug it to a power bank. 3.High Quality Screenstand-up display,Projects vehicle speed on windshield, stand-alone display as the video showing,green color speed display, easy on your eye. 4.Over-Seed AlarmJust need press the up or down to adjust it. When over-speed alarm is active, it will beep in 3 times to alert the car driver. If no need over-speed alert, adjust it to a impossible speed eg 999MPH. 5.Easy to useNo need professional installation,no wiring needed to the VSS(vehicle speed signal).Compatible with all cars&trucks.also Compatibale with motocycle&bicycle.