Although I would advise you to use rad's link to Solid Signal for illustration only. And look on ebay for deals of actual purchase at a much lower cost.
I like third party sellers such as S.S. or Weaknees, but they're just too darn expensive in most cases.
Although the DCCK-W can also be used as an RJ45 ethernet to WiFi adapter.
You don't have to use MoCA coax to WiFi.
Plus I think the DCCK-W would actually be better in that role since the firmware on the HR24 will automatically detect the DCCK-W and display its setup and configuration screen on the TV set.