C&E CNE41411 Decora Wall Plate Insert, VGA HD15 Coupler and 3.5mm Stereo Coupler, HD15 Female and 3.5mm Stereo Female, White It's used to build a clean bridge between in-wall cable runs and their origin and destinations This particular insert converts in-wall cabling to devices in the following situations Conversion from in-wall VGA and 3 5mm Stereo lines to a computer/laptop or other video and audio source Conversion from a video/audio destination to in-wall wiring UL/CSA approved, color black