Yep.
OLED55B7V
With regards to USB speed I have no idea. I just saw it on the LG forums and they stressed USB3.
However having just had a (very quick) look on Amazon I don’t see any USB2 to Gigabit. So if they exist and you are limited to USB2 on your TV then I can only wish you good luck.
Speedtest Master on the LG app store. I don’t know or care how accurate it is. I just know that even with a file that peaks well in excess of the native 100Mbps ethernet the constant buffers from yesterday with the same particular high bit rate files are gone today. 
Its not all perfect as my home connection is 300/50 and with the dongle it’s still only reporting 160/50.
But crucially like I said the 160 down takes the speed beyond any of my files requirements.
This movie actually hit 150 Mbps shortly after I took that screenshot.
