I think you misunderstand how repeaters are supposed to work. The idea is you put the transceiver in your cabinet, then blasters to your devices (if necessary). You don't need any line of sight with that part. All (except the one you posted) have a wireless link from the IR receiver base to the IR sender base. Next Gen doesn't need the receiver base at all, just the RF receiver / IR sender base. It's super simple. Just pop a transmitter battery in your remote, but the base the back or bottom of your cabinet and run blasters as needed within the cabinet. If you have reflective surfaces inside, you may not need any blasters. The device you found still requires you to aim at it and run long cables.