Provides accessory power (12-volt 10-amp), Retains R.A.P. (retained accessory power), Provides NAV outputs (parking brake, reverse, speed sense), Pre-wired AXSWC harness (AXSWC sold separately), Retains chimes to the factory speaker, Adjustable chime level, Retains OnStar / OE Bluetooth, Adjustable OnStar level, Designed for non-amplified models, or when bypassing a factory amp *, Retains balance and fade, AXUSB-CBL updatable (sold separately).