This adapter will run a single separate 3.5mm audio cable outside the yellow RapidRun Runner. Connect the adapter to the lead of the RapidRun wall plate. Connect the yellow runner to the yellow adapter lead and to your choice of a wall plate or flying lead. Then attach the separate 3.5mm cable to the 3.5mm female adapter lead and to your audio device and you're done!. Ideal for applications where video and audio are being delivered to separate equipment in different locations.