Feature:1. Can display vehicle speed, water temperature, voltage, fuel consumption, rotational speed, single mileage, total mileage accumulation, driving time, driving direction, search quantity, altitude, system time, intake pressure, oil temperature, airfuel ratio, turbine pressure, intake Air pressure, acceleration test, brake test, clear fault code, read data stream.2. With overspeed alarm, high water temperature alarm, low pressure alarm, variable speed alarm, speed alarm and other functions.3. Large color screen display, clear display of reflective reading, more convenient and practical.4. It can reduce the possibility of traffic accidents and improve your driving safety.5. Package contains a whole set accessories, which can provide much convenience for your using.Specification:Item Type: Auto OBD2 + GPS Systerm HUDMaterial: ABS+PCColor: BlackFitment: Fit for Vehicles complying with OBD II standardsInstructions: 1. The OBD cable can be connected to the OBD interface of the car, if the OBD mode is not compatible, please switch to the GPS mode.2. Connect the USB cable to the cigarette lighter interface (This mode can only be used in GPS mode)3. Navigation Method: Need to download WiiYii APP software, HUD and smart phone for Bluetooth wireless connection, and display navigation information synchronously through APPOBD Mode Function: Car speed, water temperature, voltage, fuel consumption, speed, single mileage, total mileage, cumulative driving time, number of stars, number of stars, altitude, system time, intake pressure, oil temperature, air-fuel ratio, turbo pressure, intake pressure, acceleration test, brake test, clear fault code, read data streamAlarm Function: Overspeed alarm, rotational speed alarm, high water temperature alarm, low voltage alarm, engine failure alarmGPS Mode Function: Vehicle speed, driving time, satellite time, altitude, number of satellites, driving direction, single mileage, voltage, acceleration test, brake test.Product can not automatically shut down how to solve?You can enter the Settings, select the sleep voltage, and adjust it a little higher..Package List:1 x Display1 x OBD Line1 x Car Power Cable1 x Manual 1 x Cleaning ClothNote:Please allow 13mm difference due to manual measurement.If the product can not automatically shut down, you can enter the setting item, select the sleep voltage, and adjust it a little higher.