Hello, this unit will support your original car's Logic 7 system.
Hello, In most occasions, the unit will use your original car's speakers. The unit has a small speaker which is for the sound of the GPS and Bluetooth of our unit.Only under the condition that you are using the GPS or Bluetooth of our unit and the radio or CD function of your original car in the background, the sound of the GPS will come from the small speaker and the sound of the radio will come from your original car's speaker. If you don't want the sound of the GPS to come from the small speaker while using your original car's function in the background, you can switch to our interface completely and then all the sound will come from your original car's speakers. So, the audio from GPS, phone call, audio will still come from your original car's speakers.Thank you.
By
Seicane