Certified HDMI 2.1:Officially certified Supports 8K@60Hz, 4K@120Hz, 48Gbps,Dynamic HDR, eARC, VRR, ALLM, QFT, and HDCP 2.3. Zinc Alloy Connector:Durable and corrosion-resistant for long-lasting performance. Small head design : Small head for tight place OFC Conductor:for minimal signal loss and superior quality. Triple-Layer Shielding:Blocks EMI/RFI for stable signal transmission Nylon Braided Sleeve:Flexible and durable, protecting against wear and tear. Backward Compatible:Works seamlessly with older HDMI versions. Tips :1. HDMI2.1 cable specs/price stay consistent at 1M-2M. Longer lengths (3M+) require higher AWG for performance, impacting both specs and pricing.2.For Certified 5m-8m ,choose our Long meters HDMI2.1; for 10M-100M, Choose for our fiber optic HDMI2.1 cables