The car's digital GPS speedometer displays an overspeed MPH/KM/H warning warning warning on the head. The car's GPS HUD speedometer function is safer and easier to drive: from the main direction, the visual time is reduced by 99%, and the car's GPS HUD speedometer can capture speed information with slight eye movements. The car GPS HUD speedometer reduces the frequency of line of sight adjustment, adjusts the intensity of eye direction, and reduces eye fatigue for clearer display: in strong sunlight or at night, you can choose different installation positions and clearly display speed values. Speed information disclosure, in car GPS HUD speedometer to improve driving safety and comfort; The car GPS HUD speedometer is suitable for taxis and special vehicles. Under strong sunlight, the display brightness of the car's GPS HUD speedometer will automatically increase. In low light, the brightness of the speed display will automatically reduce the overspeed alarm and fatigue driving alarm: the car GPS HUD speedometer can set different alarm speed values. The alarm will sound once every hour of continuous driving. Mileage and driving time: The car will automatically display the current mileage, current driving time, and total mileage. Other functions for displaying altitude and local time: Vehicle mounted GPS HUD speedometer obtains accurate, timely, and authoritative speed data from satellites. Quickly switch speed measurement units (kilometers per hour and miles per hour) to meet the needs of different regions. Car GPS HUD Speedometer Specifications: Type: GPS Speedometer Car GPS HUD Speedometer Material: ABS+PC Car GPS HUD Tachometer Screen Size: 3.0 inches Car GPS HUD Tachometer Satellite Positioning Speed: 1 to 3 minutes on open ground; There is no satellite signal indoors. (Rain can affect satellite positioning speed) Package includes 1 X in car GPS HUD speedometer 1 X USB cable 1 X installation accessories kit 1 X manual