Please send your car model and year to customer service before purchasing to check if your car model is suitable for OBD mode. Even if your car has an OBD plug, it may not be compatible. If you do not consult customer service to check compatibility before purchasing, any after-sales problems caused by incompatibility will be borne by the buyer
Product functions:
1. Decoration light
2. Engine speed
3. Fault code alarm icon /Water temperature alarm icon /voltage alarm icon/Fatigue driving reminder icon
4. Light sensor
5. Unit for multi-function: ℃ -degrees Celsius, KM/H-kilometer per hour, V-voltage ,MPH-mile per hour, 
℉-Fahrenheit 
6.Multi-function switch zone: vehicle speed / voltage /water temperature /when car power off, this place can show single driving distance
7. Set icons and buzzer icons
Button functions:
Button in front
1.Short Push left：Increase the parameter value after entering the setting
2.Short Push right: (1) When HUD in normal display: switch display mode (standard mode,high speed mode,simple mode); (2)decrease the parameter value after entering the setting
3.Short press inward: (1) switch voltage / water temperature /speed ; (2) return to the main page after enter into menu setting.
4.Long Push left (5s): Alarm turn on and off,one more time to turn on the buzzer.
5.Long Push right (5s): All LED on;eliminate the fault code,do it again to return to the main page.
6.Long press inward (5s): (1) Enter into settings (more details please refer to the menu table),
 (2)vertically long press 5 seconds to save and exit your settings.