[Multiple Functions Display]This G5 HUD speedometer contains multiple functions: Speed ,Driven distance ,Driving direction ,Automatic light sensitivity ,mile and kilometer ,sound alarm Switch ,speeding alarm ,fatigue driving reminder. The speed unit is KM/H or MPH, and the driver can switch freely according to his own habits.[Alarm Function]Over-speed Alarm and fatigue driving alarm to ensure your safe trip. Default setting is 120KM/H or 120MPH. You can adjust it according to your needs. When the product detects speeding, it will beep to remind the driver.[HD Screen Visiblable]The small size of 2.6 inches avoids obstructing the driving sight; which displays the information more clearly than the windshield HUD, it may make you feel more comfortable to monitor the speed and bring more fun to your driving experience, it's a good view to read the information directly without moving your eyes from the road, no need to paste any reflecting sticker on your windshield.[Plug & Play Direct]Power through vehicle cigarette lighter. The G5 HUD display the real and instance speed with GPS satellite. Compatible with all car/truck/bus/RV homemotor/boat/motorcycle waterscooter which vehicle have 5V USB port, G5 is based on the GPS dual module inside.Material:ABScolour:Black + SilverPackage Contents:1 X Host1 X USB cable1 X Non-slip mat1 X English manualOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.