The Wireless Adapter does not have to be used ONLY with the Union Room, it's just like a regular link cable. Trade and battle normally without going into the Union Room.
yea i found that out when i was straightening my radio antenna, the signal came out stronger, so i tried it with the adapter and it got it up to 16.5 metres/50 feet whereas without my hand it only did the normal 10 metres/30 feet