This is a 3 Foot long, standard 1/8" (3.5mm) headphone style Mono (not-stereo) Male Plug to Male Plug cable.
Connector A: 3.5mm TS (mono) plug (male)
Connector B: 3.5mm TS (mono) plug (male)
Length:...
A common use of this adapter is to plug a Digital Coax RCA cable into it, and convert it to the digital signals for some sound card jacks. Or, simply convert your rca mono plug into a mono 3.5mm plug.