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.