The LK-LKV372POE HDMI extender transmits HDMI signal from a source like Fox Box or a Blu Ray player etc. up to 50m to your HD display over single CAT6 or better. Only one power adapter is needed for the transmitter as the receiver can be powered by the transmitter over network cable. This HDMI Extender support IR passback for remote control of source device too!. Currently in short supply.