BLACK HDMI KEYSTONE COUPLER provides a professional-looking installation for home theater A/V configurations with a wall mounted UHD TV; Connect a Blu-ray player, streaming video player, UHD TV, projector, computer or other device with the common HDMI port 4K VIDEO RESOLUTION SUPPORT for 3D, 4K, Audio Return Channel, Consumer Electronics Control features of your HDMI cables and devices; Audio support for 5.1 and 7.1 surround sound audio SNAP IN HDMI PIGTAIL ADAPTER with a keystone jack clip to provide a secure connection; Vertically oriented HDMI jack pigtail is compatible with a keystone jack wall plate (sold separately) with standard keystone jack blank openings