G10 GPS Head-Up Display Car Electronics HUD Projector Display Digital Car Speedometer Accessories For All Cars Note: GPS Version: For all models, the connection is a USB interface.5v . Display data: vehicle driving speed, altitude height, system time, single mileage, travel time, acceleration test, braking test, satellite number, compass, MPH & km/hAlarm: speed alert, fatigue alert General Problem:Q1: Why does it automatically turn off after a period of time? A1: Its default sleep time is 30s, So when your engine is turned off, it will automatically turn off after 30s .please choose Sleep Time Set"to set the sleep time. Q2: Why my car dashboard lights or fault alarm lights are caused to be lit up abnormally? A2: When used in some cars, car dashboard lights or fault alarm lights are caused to be lit up abnormally, chooseProduct inf"-Matching inf"to see the solution, and use needle-nose pliers to twist off excess pins to eliminate such phenomena.FQA:How to Install the HUD Car Computer:1. Insert the product into the check port on the vehicle USB computer;2. Insert the other end of the product into the data interface of the host;3. After the product is inserted into the host and the car is started, wait for the communication linkage between A202 and the car;4. After the linkage is successfully established, the host will send a drop"sound, at the same the display screen displays vehicle protocols and then indicates that it is the first time the product is used to set up parameters. (International universal OBD plug protocol definitions stipulated by SAE).