Our 8k Ultra High Speed HDMI Cable are designed to support the latest HDMI v2.1 specification. This cable ensures high-bandwidth dependent features are delivered including uncompressed 8k video with HDR. It features exceptionally low EMI (electro-magnetic interference) which reduces interference with nearby wireless devices. It is also backwards compatible with earlier versions of the HDMI Specification and can be used with existing HDMI devices. Specification:  Supports 48Gbps bandwidth Full copper 26AWG conductors Black cable with blue aluminium connectors Length 5 metre Maximum resolution support*: 4k @ 120Hz 8k @ 60Hz Gold plated connectors Black cable braiding Ultra High Speed HDMI Cable Auto Low Latency Mode (ALLM) Enhanced Audio Return Channel (eARC) Quick Frame Transport (QFT) Quick Media Switching (QMS) Variable Refresh Rate (VRR) Backwards compatible with earlier versions HDMI Ethernet Channel  Please note 5 meters is the absolute limit for a passive cable at 4k120Hz and 8k60Hz the cables are rated for these resolutions but different compatibility levels between chipsets can cause problems. There are also are number of chipset bugs in HDMI 2.1 equipment causing problems at high refresh rates. If you have high refresh rate problems we recommend using a fibre optic hdmi cable.