WYING M17 OBD HUD Car Digital Speedometer Projector Auto Fuel Consumption Head-up Display GPS Projection On All Cars Note HUD Model: M17System: OBD+GPS dual system GPS system: Compatible with all cars. OBD2 system: Compatible for: Cars in OBD2 system.OBD2 VersionIt works when the car is running, and turn off when the car's ignition is off.OBD2 Display data : Speed, coolant temperature, voltage, mileage, clear faulty code.Alarms : over-speed alarm, high water temperature alarm, low voltage alarm, fault code alarm, fatigue driving alarm.Automatically turn on or off : After the engine is turned off for 30 seconds, the HUD will automatically shut down; when the engine is started, it will automatically display after 5 seconds. Our HUD with a switch, which can be turned on and off manually. If you do not drive for a long time, it is recommended to manually turn off the HUD. HUD CAN AUTOMATICALLY ON/OFFAfter the engine is turned off for 30 seconds, the HUD will automatically shut down; when the engine is started it will automatically display after 5 seconds. LIGHT SENSOR ANDEASY INSTALLATIONPlug and play,HUD can automatically adjust the brightness according to the environment. Function 1.Light sensor: HUD can automatically adjust the brightness according to the environment. 2.Speed icon: OBD mode: speed, car ECU data. GPS mode: satellite data , compass. 3.System icon: short press the + key within 5 seconds to choose OBD or GPS system. 4.Speed display. 5.Speed unit: KM/H=kilometer/hour, MPH=Mile/hour. 6.Satellite icon: observe Satellite icon: after the satellite is found, it stops flashing and goes out, then it can be used normally. 7.Driving direction: driving direction. indication:W=West, N=North, S=South, E=East. 8.Over-speed alarm icon. 9.Water temperature icon, Voltage icon. 10.a + =100km acceleration test, ASL=altitude, LHK=fuel consumption, MIN=travel time,TRIP=travel mileage. 11.Multi-function area: speed, water temperature, voltage, mileage, driving time, fuel consumption, altitude, clock, 100 kilometers acceleration. Buyer Evaluation Chart Please Note: OBD system is suitable for most cars after 2007. OBD2 model can work for OBD2 gasoline vehicles produced after 2004 in USA, and OBD2 gasoline vehicles produced after 2008 in other countries. OBD2 model is not applicable for the following cars: FQA: How to Install the HUD : 1. Insert the product into the check port on the vehicle; 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). 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, choose"Product inf" -"Matching inf" to see the solution, and use needle-nose pliers to twist off excess pins to eliminate such phenomena.