x5 car hud head up display vehicle obd2 car speedometer windshield projector driving speed alarm voltage mph km/h display

this product is for drivers' safety, especially in high-speed driving at night, hud can keep driver eyes on the road and can decrease car accident. hud can project the important information (such as speed) onto the windshield, it can help inexperienced novice to control their speed and to avoid speeding violation in the speed limit road. more importantly, it enables the driver instantly read the number in great vision and always make drivers eyes on the road in clear mind.