IMPORTANT: This article applies only to specific products and/or operating systems. Check the Applicable Products and Categories section of this article before starting these steps.
The black plastic frame in the box is the protection collar. The protection collar enhances the cosmetic appearance of the car stereo by covering up the metal case that houses the electronics of the unit. The protection collar is attached to the car stereo after it has been installed.
NOTE: Not all car stereo receivers are supplied with the plastic frame. To see if your car stereo has this frame, check the instruction manual or the specifications. Manuals are posted on your model support page.