HDMI Ethernet Channel adds a high-speed network to an HDMI connection, allowing users to get the most out of their IP-enabled devices without a separate Ethernet cable. Audio Return Channel allows an HDMI-connected TV with a built-in tuner to send audio "upstream" to a surround audio system, eliminating the need for a separate audio cable. 3D defines input/output protocols for the major 3D video formats. This cable features HDMI connectors on both ends and is made with high-quality materials, including gold-plated metal connector housing and enclosure for better shielding, as well as gold-plated contacts for increased durability.