The rst on the car display is the initialization button switch, which can restore the navigator to the system. Car button switch function expansion movement: 1. autohold is the automatic cruise function button switch; 2. ok and sel keys are the menu selection confirmation button switches, on the steering wheel of a multi-function car; 3. ac button switch is the power switch of the refrigeration compressor, That is, the air conditioner dehumidification power switch; 4. vol is the button switch to adjust the external sound addition and subtraction up and down; 5. mute is the mute mode button switch; 6. mode is the switch mode button switch; 7. set is automatic on the steering wheel of a car with multiple functions Adapt to the cruise function button switch; 8. info is the data information display function button.
