Yes. It is not battery powered. 

so i have a beam gen 2 for my TV what can u suggest so i can have music in my bedroom / bathroom etc using sonos but no direct power connection

ROAM 2 or MOVE 2.

However, neither of those battery powered speakers can be ‘bonded’ to the Beam as surround speakers. Great for music, though, as long as the battery lasts. Which tends to be longer than I expect. 

I think information like this is available on Sonos’ web site. Take a look at portable speakers.