Rear window and outside mirror defroster/windshield deicer (if so equipped) switch

Rear window and outside mirror defroster/windshield deicer (if so equipped) 
switch  - Instruments and controls - Infiniti QX Owners Manual - Infiniti QX

See also:

FM radio reception
Range: FM range is normally limited to 25 – 30 mi (40 – 48 km), with monaural (single channel) FM having slightly more range than stereo FM. External influences may sometimes interfere with FM station ...

Card holder (if so equipped)
The card holder is located on or behind the driver’s or passenger’s sun visor. To use the card holder, slide the card in the card holder. ...

Music Box® (if so equipped)
The Music Box® can store songs from CDs being played. The system has 9.3GB storage capacity in models with navigation system or 2.0GB (800 MB for music storage) for models without navigation system. ...