Review on 🔌 ECHOGEAR 8ft Braided HDMI Cable - 4k and HDR Compatible - Meets Latest HDMI Standard - Gold Plated Connections - Supports HD, 4k Ethernet Signals, 120fps Refresh Rate, and 48gbps Bandwidth by Stan Myers

Doesn't say anything about it being 2.1. It doesn't actually say anything about it. So I can't say for sure if it supports 2.1. I know it looks and works great for 1080p and standard 4k. I was very disappointed to see that it was little used. There were traces of gold at the junction. The logo was also removed from one end. There were also no connector caps on the ends. You know those plastic connectors that every HDMI vendor puts on their BEW cables? Not with this cable. Also the connector insert is too tight and the pita has to be removed as there is a hook on those ends looking into the connectors. Okay I guess for things you move around a lot to keep the cord from coming loose. But without documents indicating the possibility of reproduction, buy them on the word. We need someone to actually test these cables.