Adapter Cables for PC's:
The Audio-Visual adapter required to connect PC's consists of a 3.5mm audio extension cord combined with a VGA video extension cord.
The two cables are rolled into a single cable for convenience and simplicity, but separate audio and video cables would work as well. This simpler single cable can be purchased from your favorite technology store. For reference, details are provided below for purchasing the cable from Columbia-approved vendors like CDW-G and Govconnection, as well as other vendors.
These cables are 25 feet long, with SVGA/VGA video (male-to-male) connectors combined with 3.5mm Audio (male-to-male) connectors.
Tripp Lite 25ft SVGA or VGA RGB HD15 M/M Monitor Cable w/ 3.5mm Audio, 25’
Mfg. Part: P504-025
CDW Part: 1138944
Premium VGA Cable with Audio, 25ft
Item #: 7056779
Mfr. Part#: EVNPS09-0025
At Amazon: Search for "vga cable with audio 25ft".
Here is one example of an appropriate cable available at Amazon.