F9 OBD2 + GPS Mode Car HUD Head-up Display Speed Water Temperature Voltage Display 1. It displays driving data on the car windshield such as speed,RPM,water temperature,voltage,single mileage etc;avoiding drivers unsafely because of watching the instrument while driving.Drivers can read the driving information instantly, and always keep the best state on the way with HUD. 2. OBD mode display information: vehicle speed, water temperature, voltage, fuel consumption, speed, driving distance, driving time, time, oil temperature, kilometers per liter, air-fuel ratio, turbo pressure, intake pressure, number of satellites, driving direction, brake test, read data stream Alarm: overspeed alarm, speed alarm, high water temperature alarm, low voltage alarm, engine failure alarm, clear fault code 3. GPS mode Display information: vehicle speed, driving time, satellite time, altitude, number of satellites, driving direction, single mileage, voltage, acceleration test, brake test Alarm: overspeed alarm, low voltage alarm 4. Features: high-definition display screen, multiple UIs can switch different screens, and the digital color of the interface can be adjusted freely 5. Navigation method: need to download WiiYii APP software, HUD and smart phone for Bluetooth wireless connection, the navigation information will be displayed synchronously through APP