Features： 1、Solve the trouble of constantly looking down at the instrument panel, allows you keep your eyes ahead to enhance driving safety. 2、With alarm function, overspeed alarm, RPM alarm, water temperature/voltage alarm, engine failure alarm, clear fault code, high safety factor. 3、OBD mode function, can shows vehicle speed, water temperature, voltage, fuel consumption, RPM speed, single mileage, total mileage, etc. 4、GPS mode function, can shows altitude, number of satellites, longitude and latitude of driving direction, vehicle speed, driving time, etc. 5、Just connect the HUD with car OBD port by OBD cable, HUD will display when car engine on, easy to install. Specification： Item Type: Head Up Display Material: ABS Color: Black OBD Mode Function: Vehicle speed, water temperature, voltage, fuel consumption, RPM speed, single mileage, total mileage, driving time, longitude and latitude of driving direction, number of satellites, altitude, time, intake pressure, oil temperature, air-fuel ratio, turbo pressure, intake pressure, acceleration test, brake test, read data stream GPS Mode Function: Vehicle speed, driving time, satellite time, altitude, number of satellites, longitude and latitude of driving direction, single mileage, voltage, acceleration test, brake test Alarm: Overspeed alarm, speed(RPM) alarm, water temperature alarm, voltage alarm, engine failure alarm, clear fault code. Compatible: Suitable for vehicles complying with OBD II standards Instructions: 1. Simply connect the head-up display (HUD) with the on-board diagnostic interface (OBD) through the OBD cable, and the head-up display (HUD) will display when the car engine starts. 2. Connect the USB cable to the USB interface, it will display when the car engine starts 3. GPS use method: Need to download for WiiYii APP software, wireless connection between HUD and smartphone via bluetooth, navigation information is displayed synchronously through APP. Package List： 1 x Host  1 x OBD Line 1 x USB Cable 1 x Suction Cup Bracket 1 x Double-Sided Tape 1 x Anti-Slip Gasket 1 x Manual