Any idea what this audio cable is for? It doesn't seem to be a mic or a light... totally flustered
It looks very similar to the one in a picture from a well known supplier:



Figure 1. IR pickup.


Place of Origin: Guangdong, China (Mainland)
Brand Name: SLR
Model Number: slr-ir1
Type: Optical Fiber (dubious)
Application: DVD Player
Testing: 100% open &amp; short test
Working Temperature: -25oC ~ +85oC
IR emitter: 36 kHz - 38 kHz, 20 - 60 kHz


Internally it would be just something like this:



Figure 2. VR838 IR receiver.

Its purpose is probably to pickup an IR remote control signal without direct line of sight to the box being controlled. e.g. A DVD player in a cabinet could have the IR sensor discretely placed outside the cabinet.