Transmitter connects to source (eg Sky box) and sends HDMI signals (HD video and 5.1 audio) to the receiver connected to distant TV. The receiver will pick up Sky remote IR commands and send them back to the Sky box to change channel (and other commands) from the distant room.
I know there have been some skeptics about this gear in these forums but, as I have reported a couple of times earlier here, these units have worked reliably for us from an upstairs TV to a downstairs TV in two different houses - albeit with fairly short point to point distances - "as the borer flies".
Selling only because we have moved and the new house has built-in AV wiring.
All in as-new condition in original packaging with manual etc.
Please PM me if any interest. I can mail for $10 or pickup is from Mairangi Bay, Auckland North Shore.