HDMI accessories are additional items that enhance the functionality of HDMI connections, which are commonly used to transmit high-definition video and audio between devices. These accessories include HDMI cables, which come in various lengths and types, such as standard, high-speed, and ultra-high-speed, to support different resolutions and refresh rates. Other popular HDMI accessories include HDMI splitters, which allow one HDMI source to connect to multiple displays, and HDMI switches, enabling multiple sources to connect to a single display. Additionally, HDMI extenders can help transmit signals over longer distances, ensuring quality performance in various setups.