I just bought a used Pioneer AVH-6500 In-Dash DVD system. I just want to know what that "Brain" black box does. All I got was the Actual Pioneer Unit, the cage and the wire Harness?

 

This is the one I bought from a local guy on the forums

Pioneer AVH-6500 Car Audio Video Dvd Stereo MP3, XM

Retail Price $840.00
Condition Used

guarantee the item to work will allow a 3 days return

Cables Included: YES
Mounting Hardware Included: YES
Original Box Included: NO
Remote : NO
Formats Supported: Dvd, Cd,Mp3,WMA playback

Product Features

6.5" TFT Active Matrix LCD Color Screen, Widescreen 16:9 Aspect Ratio
Touch Panel Control with AGLR Coated Screen
New Fully Motorized Mechanism with Display Angle Adjustment
Full Audio/Video Inputs for System Flexibility
Ultra-Slim Profile Built-in DVD/CD/MP3 Player which is compatible with DVD-Video /DVD-R/RW/ Video CD/ CD-R/RW/MP3

For this model do I need that "hide away unit"? What does that box do, Navigation, TV????

 

BUMP