Liberty AV's Digitalinx HDMIDefinition:
HDMI (High-Definition Media Interface): A standard for connecting video, audio, security, and control signals. adapter rings feature a patent-pending tensile aircraft strength ring and clamp that locks to an HDMI cable (sold separately) keeping all of your adapters at your fingertips. Not only do you get a solid and reliable connection, but the adapters are secured to the HDMI cable so they can't get lost before the next presentation.