Dvdo-cat-HDMIAudio-150 is an extender that can transmit HDMI Arc (audio-only) or S/Pdif signals up to 490ft/150m via a single CAT6/5e cable. The transmitter includes one HDMI and one S/Pdif audio inputs. The receiver includes one HDMI and one S/Pdif audio outputs. For Tvs featuring HDMI Arc, Dvdo-cat-HDMIAudio-150 extends the audio signal from the Tv's HDMI Arc port back to the receiver's HDMI input. It supports Cec pass-through, allowing both devices to be controlled with a single remote. For TVs that don't support HDMI Arc, Dvdo-cat-HDMIAudio-150 extends the audio signal from the TV's S/Pdif output back to the receiver's S/Pdif input.