Note: (1). For Europe and North America,it only can be used for Cars with OBD2 manufactured after 2003.For Asia, it only can be used for Cars with OBD2 manufactured after 2007. (2).Do not Support OBDI and JOBD (JapaneseOBD) Car. (3).This device don't compatible with the cars that have special interface,like 2004,SUV, JEEP, Pickup, Truck. Feature: This A8 HUD is designed to reflect your vehicles computer information onto your windshield offering a safer driving experience day to day as well as more importantly at high speeds and during night driving. As it removes the need for the driver to dip their head to view the instrument cluster. Installing this unit correctly will enable you to more effectively monitor your speed, this is helpful for novice drivers as well as experienced drivers in potentially avoiding speeding infringements. Warm Remind 1. Auto start/off setting The default start/off voltage is 132,if your hud failed auto start,you can try to reset your voltage to 128. Sometimes if your car power off,and HUD may still working, you can adjust the default voltage to 135 -138,then it can auto power off. 2. If the HUD displays only voltage for 30 seconds and then turn off automatically, because the interface isn't OBD II or EOBD. We suggest checking twice whether your interface is OBD2/EOBD or not before purchase. 3. For old cars, please set your start voltage at 12.8V, as your battery is too old to provide 13.2V voltage. FQA Q: Why the display is blurry on the windshield? A: Because the windscreen is double, which will make double image on the windscreen when display, please stick the reflection film on the windscreen. Package include: 1 x Head up display 1 x O B D Cable 1 x Reflecting Film 1 x Anti-slip Pad 1 x English User Manual