Connecting Bluesound Node 2i to remote stereo system over WIFI -

dumb question - I have my Node 2i set up on my Livingroom stereo - direct rca interconnect connection.  I want to connect it also to a system I have downstairs. I have it set up now via bluetooth - which works, but drops out and is buggy.
   Is there a simple and low cost wifi attach devise that I can use in place of blutooth that I don't have to constantly restore the connection to?

thanks in advance!