HDMI 2.1 is the latest version of the High-Definition Multimedia Interface, designed to support higher video resolutions and refresh rates. It can transmit video up to 8K at 60Hz and 4K at 120Hz, making it ideal for modern gaming consoles and high-definition TVs. This version also supports dynamic HDR, enhancing picture quality by adjusting brightness and color on a scene-by-scene basis. Additionally, HDMI 2.1 introduces features like Variable Refresh Rate (VRR) and Auto Low Latency Mode (ALLM), which improve gaming performance by reducing lag and screen tearing. It also supports enhanced audio return channel (eARC) for better sound quality, making it a versatile choice for home entertainment systems.