What is HDMI 4?

HDMI 4, also known as HDMI 2.1a, is the latest version of the High-Definition Multimedia Interface (HDMI) standard, offering advanced features for audio and video transmission. It supports higher resolutions up to 10K, refresh rates up to 120Hz, and features like Variable Refresh Rate (VRR) and Enhanced Audio Return Channel (eARC). This version is designed to enhance the gaming and Home Theater experience, ensuring compatibility with next-generation devices and technologies.