User manual for Head Up DisplayHUD short for Head Up Display.It displays driving datas on the front windshield such as speed, rpm, fuel consumption,water temperature,voltage;avoiding drivers become dangerous because of watching the instrument while driving.Drivers can read the driving information instantly,and can always keep the best state on the way with HUD. HUD Main Functions&Features: 1.Available for cars with OBD2 and EUOBD port(Car automatic diagnosis system) ,plug and play 2.Rich contents: Speed, engine RPM,water temperature,voltage, fuel consumption, engine fault code 3.Display mode: default mode, high-speed mode, automatic mode. 4.Kilometer and Mile can be switched freely. 5.Screen 5.5 inch HD display, easy for read 6.Auto power on/off: HUD start and off with vehicle started and shutdown, effective protection of the car battery;retaining the manual switch mode,more easy to control HUD. 7.Over speed alarm include single-speed alarm and four-stage alarm 8.Engine RPM alarm can help to fuel-efficient by shifting, and is good for novice.9.Automatic and manual brightness adjustment mode,driving without glare When HUD is power on, setting method for the button 1.Push left: switch for clock,water temperature,inlet pressure,engine RPM,ignition angle,acceleration time for 100 Kilometers (pls note, after enter into the setting menu, push left is to increase the parameter) 2.Push right: switch for fuel consumption,Throttle position(pls note, after enter into the setting menu, push right is to decrease the parameter) 3.Vertical Short press : enter into the setting menu, vertical short press is to increase the menu 4.Long push right for 5s: turn on or off the alarm sound. 5. Vertical long press: enter into the setting menu(0-23), after finish the parameter adjustment,vertically long press 5s to save and exit Beep sound on/off: Push right for 5 s, all the Alarm function off, again push it 5 s, Alarm function on .Package Contents: 1*Head Up Display 1*OBD Connector Cable 1*Non-slip Mat 1*Reflective Film 1*User Manual