Product Features:1. WiiYii CAR 100% Brand Guarantee2. With Mirror Projecting, Display Data is more shine and clearly: 6 different Display modes3. Safty driving, Keep your eyes ahead, No need to down your head to see Dashboard while driving4. Easy to Install, Only need connect the HUD with Car OBD port by OBD cable, HUD will display when car engine on / off5. Over-time driving Alarm, Low Voltage Alarm, Over-speed Alarm, High temperature Alarm, Engine faulty Alarm6. KMH & MPH Switch Freely.7. Compatiable for: Cars in OBD II Standard (after 2007 years)8. Installation position: On Center Console9. Connection: Connect with Car OBD port10. Display information: Speed, engine RPM,water temperature, driving distance,battery voltage, Turbine Pressure / intake pressure, Faulty Code Read... Specification:-Drivig Speed(km/mile), Over-Speed Alarm -Engine RPM, RPM Alarm -Battery Voltage, low voltage alarm - water temperature(°C or °F),high water temperature alarm -Mileage -clear the fault code manual or auto adjust the brightness