Arris' SBR-AC1900P SURFboard Wi-Fi Router with RipCurrent G.hn Technology combines a conventional AC1900 class design with an underdog powerline networking technology.
Bottom antenna is odd, but they should've done a proper test to see which locations are the best for the antennas and sometimes those locations don't make 100% logical sense.
This tech is actually where I was hoping Ubiquiti was taking the direction of, with their new AmpliFi residential lineup...the G.hn seems like a good setup for satellite wireless APs to cover larger homes.