A900 Car HUD OBD RPM Meter Head-Up DisplayOverspeed Warning System Car Accessories Water Temperature Alarm Product Features: 1.WYING100% Brand Guarantee 2.Safely driving, Keep your eyes ahead, No need to down your head to see Dashboard while driving 3.Nano-technology to eliminate double reflections, more clarity 4. Easy to Install, Only need connect the HUD with Car OBD2 port by OBD cable, HUD will display when car engine on / off 5. Over-time driving Alarm, Low Voltage Alarm, Over-speed Alarm, High temperature Alarm, Engine faulty Alarm 6. KMH & MPH Switch Freely. 7. Compatiable for: Cars in OBD II Standard (after 2007 years)Diesel cars, pure electric cars, hybrid cars cannot be used 8. Installation position: On Center Console 9. Connection: Connect with Car OBD2 port 10.Display information:speed, RPM, water temperature, voltage, single driving distance, low voltage alarm, high water temperature alarm, over speed alarm, freely switch between kilometers & miles. 11.Multi-color design makes the screen clearer and easier to read 12. 5-level brightness adjustment, automatic and manual brightness adjustment modeShort Pull Up To Switch Display Mode Mode 1: Speed + RPM Mode 2: Speed + Water Temperature Mode 3: speed Mode 4: Speed+ RPM + Water TemperaturePackage List: 1* HUD body, 1* OBD data line, 1* Reflection film, 1* Anti-slip mat, 1* English ManualProduct Size: Screen size:3.5 inch Product size:90x54x12 mm Product weight: 40g 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 Car Computer: 1. Insert the product into the check port on the vehicle OBD 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).Common 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.