This is the Audio Port IO Circuit Board / Cable, for the Alienware X15 R1 / R2. This houses the Universal audio jack at the right side of the laptop- for connecting headphones or a headset (headphone and microphone combo).
Compatible Dell Laptops:
Alienware x15 R1
Alienware x15 R2
DPN: 80WMW
alt Part Number's:
GDS50_AUDIO_CABLE
DC02C00U100
LFK475P