Dodge 2012 Ram - Manual (Page 338)

Headphones Operation
The headphones receive two separate channels of audio
using an infrared transmitter from the video screen.
Front seat occupants receive some headphone audio
coverage to allow them to adjust the headphone volume
for the young rear seat occupants that may not be able to
do so for themselves.
If no audio is heard after increasing the volume control,
verify that the screen is turned on and in the down
position and that the channel is not muted and the
headphone channel selector switch is on the desired
channel. If audio is still not heard, check that fully
charged batteries are installed in the headphones.
1. Volume Control
2. Power Button
3. Channel Selection Switch
4. Power Indicator
336 UNDERSTANDING YOUR INSTRUMENT PANEL