high quality HDMI 8K keystone jacks support the 8K@60Hz and 4K@120Hz resolutions as specified in HDMI 2.1; Take advantage of the latest HDMI features including enhanced Audio Return Channel, Auto Low Latency Mode and Variable Refresh Rate for gaming, 5.1 and 7.1 and object-based surround sound, and more with the HDMI pass-through connectors Quick connect installation with reusable keystone jack inserts that can be easily disconnected and relocated when upgrading or redecorating; Connect an HDMI 90 or 270 degree angle adapter to route cables in tight spaces Cost-effective 2-pack provides a pair of HDMI inserts for connecting a video source and an HDTV with the cables concealed behind the wall for a customized installation; Upgrade existing keystone jacks to 8K or add new connections to an existing setup Commercial grade 8K HDMI 2.1 keystone Jack insert provides a professional looking installation for home theater A/V configurations with a wall mounted HDTV; Connect a Blu-ray player, streaming video player, HDTV, projector, computer or other device with the common HDMI port Sturdy snap-in construction of female to female HDMI 2.1 coupler provides a secure connection; Vertically oriented keystone is compatible with a wall plate or patch panel (sold separately) with standard keystone jack blank openings