Dodge 2015 Charger - Owner Manual - Manual (Page 352)

The USB “Charge Only” ports will recharge battery
operated USB devices when connected.
STEERING WHEEL AUDIO CONTROLS — IF
EQUIPPED
The remote sound system controls are located on the rear
surface of the steering wheel. Reach behind the wheel to
access the switches.
Rear USB Charging Ports
Remote Sound Controls (Back View Of Steering Wheel)
350 UNDERSTANDING YOUR INSTRUMENT PANEL