RB260GS Version

Hello.
I’m going to buy one RB260GS for my home.
And the question is how to determine the version of the Swos before buying? I think I need version 2.x
This is my set:

                                               ------ IPTV box
Provider ----- R7800 ------ unmanaged switch /
                                             \
                                               ----------- Other network devices (MediaPlayer, AV Reciever)

How to transfer Multicast only to port to IPTV box, no others?
It’s possible with RB260GS and Swos 2.x?
Thanks.