Many of our cables, including a range of Certified Ultra High Speed HDMI 2.1 cables in lengths from 3’ (HDMM21V1M) up to 16’ (HDMM21V5M), have third-party certifications. Cable quality and integrity matter when dealing with 8K resolutions, or 4K at high 120Hz refresh rates. This line of cables has undergone rigorous compliance testing and is certified by an HDMI Authorized Test Center, so you can be sure your high-performance video installation won’t be held back by cable issues.