Features: HUD Head Up Display compact-body, no matter where it is placed, is clear and natural, without blocking any-vision. Vehicle HUD Display has LED to automatically adjust the screen brightness according to the current ambient-light, bringing a comfortable visual experience. Car GPS Tachometer accurately displays the speed, adds the speed calibration function, and can be adjusted to be consistent with the display of the car dashboard. GPS precise positioning is not affected by the weather. Car Display has two alarm functions, which can set overspeed alarm and remind you of fatigue driving for 8 hours continuously. Time-LED Display is powered by USB, and completely powered off with the vehicle flameout, with zero-power consumption. Automatic photosensitive mode, which automatically adjusts the brightness of the display according to external light, making it clearly visible even in strong light. Specifications: Material:PC+ABS Screen size:2.4'' Package Includes: 1x Car HUD note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.