Seems like a useless product to me. Even if you need to send a HDMI signal 2 miles. Even using Ethernet seems like a bad idea to me. Say your Ethernet wire cost 5 cents per foot at two miles your looking at ~$528.00, another $300 for the transmitter, the receiver. and then the time and work needed to trench / run a 2 mile long cable. So total cost of over $800+ not counting the work for the 2 mile wire run.
Would be way cheaper and faster to buy an HDMI to IP Ethernet adapter then use a wireless bridge from Ubiquiti that has 9 mile (15 km+) range or more depending on which product.
Same company makes the HD-Link HL13 HDMI to TCP/IP
https://sewelldirect.com/hd-link-pro-by-sewell-hdmi-over-single-cat5-extender-1080p-330-ft-
$90
With an Ubiquiti PowerBeam ac Gen2 (Which Ubiquiti site says has a 25+ km or 15 mile range.)
http://a.co/jhvAwE4
$120
$90 for the HDMI to TCP/IP converter + $240 for the wireless bridge. Total cost $330 and no need to trench / run a wire 2 miles.
Or cut out the HDMI converter all together. Do a wireless bridge with a cheap NUC pc. Then upload your video or ad (for digital signage as Linus talked about) Playing off the NUC to get clearer less compressed video on the other end. Would probably still be cheaper then running a 2 mile wire.