The ST121SHD50 is HDMI® over Cat5e/Cat6 video extender kit lets you extend HDMI video and audio by up to 165ft (50m) over dual Cat5e cables or 130ft (40m) over dual Cat6 cables. For added versatility the kit features power over cable and only requires a single power adapter that can be connected to either the transmitter or receiver. With support for high-definition resolutions of up to 1920x1080/1080p and the accompanying digital audio, this cost-effective HD extender can easily be installed using new or existing Ethernet infrastructure wiring. For a convenient plug-and-play installation, the HDMI extender features built-in EDID monitor emulation, which ensures native resolution and maximum compatibility with your display or projector.