Comcast installed one in the low voltage panel when they replaced the cable a couple of years ago. I did not look at the Amazon devices previously mentioned. I have had problems with some electrical type devices from Amazon (splices, crimp connectors, coax connectors, etc.) that were VERY CHEAP and failed when installed, therefore I now get these type devices from known suppliers, Jameco, Digikey, etc. to name a few.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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