The ST121UTPHDGB HDMI audio video extender over Cat 5 with RS232 & IR extends an HDMI (or DVI) source signal using a standard Cat 5 or better UTP/STP cable, giving you the freedom to optimize the placement of your display without sacrificing image quality. Compliance with HDMI as well as HDCP ensures that even the devices will be able to pass a signal with support for full 1080p resolutions & the accompanying digital audio.