Car Speedometer Accessories For All Cars Product Functions Note OBD2 Version: Compatible for: Cars in OBD2 system When you're ready to place an order, but you don't know whether your car is compatible with the HUD, you can contact with us We're glad to help you GPS Version: Compatible all cars. OBD2 Version It works when the car is running, and turn off when the car's ignition is off. OBD2 Display data: Speed, coolant temperature, voltage, mileage, clear faulty code. Alarms: over-speed alarm, high water temperature alarm, low voltage alarm, fault code alarm, fatigue driving alarm. Automatically turn on or off: After the engine is turned off for 30 seconds, the HUD will automatically shut down; when the engine is started, it will automatically display after 5 seconds. Our HUD with a switch, which can be turned on and off manually. If you do not drive for a long time, it is recommended to manually turn off the HUD. The brightness can automatically adjust by environment GPS Version It is compatible with all cars And supports over-speed alarm. Product working voltage is 5V, and it is forbidden to use a voltage higher than 5V for power supply. Some vehicles voltage are highter than 5V, it doesn't matter. Our package included a usb cable, you need to plug usb cable in cigarette lighter, and connect it with HUD. Number of search satellites. Compass: N (North) E (East) W (West) S (South). Vehicle speed display,Speed unit: MPH- mile, KM/H- kilometer. Fatigue Driving Alarm: Fatigue driving alarm is 4 hours, user can freely set this time or turn off this alarm, setting time range: 1-8 hours. Multi-function switch and use the newest upgrade hardware 4 major functions can be switched Product Size Screen Size: 3.2 inches Display Type: Windshield ProjectorDimension: 8.6x3.7x1.6cm Integrated shading design Covering the screen light, not buzzing at night driving Easy to install Step1: Insert the OBD socket connector. Step2: The wire is stuffed into the A-pillar sealing strip. Step3: Connect one end of the obd interface to the HUD and place the HUD to a suitable position. OBD2 Version (It is compatible with OBD2 and EOBD system, it supports over-speed alarm.) 1.Multi function: Speed, Water temperature, Voltage 2.Short Press the button "M" To switch voltage, water temperature,vehicle speed,enter into menu setting to switch menu options or parameter values Long Press the button "M" To enter into menu settings (see instructions for Menu 1-12) and press 5 seconds to save and exit 3.Short Press the button "-" Menu - and parameter value - Long Press the button "-" To turn on and off the buzzer(default choice is buzzer on,you can freely choose to turn on or off) 4.Engine icon, Water temperature icon 5.Voltage icon, Fatigue driving icon 6.Light sensor:HUD can automatically adjust the brightness according to the environment 7.Speed unit: MPH- mile, KM/H- kilometer 8.OBD connection port 9.Power switch Long press for 5s to turn off,again to turn on 10.Short Press the button "+" Menu + and parameters value + Long Press the button "+" Long press till the screen is all on, and the fault code is eliminated, long press again to exit