Functions: Display data: car speed, time, RPM, voltage, water temperature, travel time, travel distance, satellite number, altitude, travel direction, latitude and longitude, oil temperature, acceleration test, brake test, turbo preure, engine load and other car data.6 alarm functions, including speed, water temperature, low voltage, high voltage, fatigue driving, vehicle DTC and other alarms.With this head-up display, you can clear the fault codes yourself without having to go to a repair store and pay for the repair.5 display pages, 5 interfaces, free switching, LCD gauges, clear display of various data.2 types of installation: with adjustable bracket, mounted on the dashboard or attached to the windshield.It allows you to understand your car more clearly without looking down at the dashboard and adds a sense of technology to your car. Specifications: Material: ABS+PCScreen Size: 3 InchScreen Type: LEDInput Signal: OBDColor: Black Package Included: 1 x F15 HUD1 x OBD Cable1 x Rotary Holder1 x English Manual Note: If your car is pre-2004 (for US automakers) and pre-2008 (for European/Asian automakers), OBD is not compatible. OBD is not compatible with some special vehicles, such as electric vehicles, diesel vehicles, hybrid vehicles, pickup trucks, paenger cars, etc.The F15 includes both OBD and GPS chipsets, OBD may not be compatible with your car, but it's still a cool HUD because its GPS works on all vehicles. G4 Function: 1 speed2driving direction guide3 5 color mood lights4 Simple mode display5 Ambient light acceleration display6: One-key switch between kilometers and miles7: Automatic photoreceptor Call the police: 1 Overspeed alarm2 Fatigue driving reminder