Hi, Your question isn't much clear. I think you are asking about wifi speaker systems, these are the wireless fidelity systems which work under a specific frequency range.
If you are asking about multi room systems I have found one resource that may help you anyways
high-end-audio-products.blogspot.com/2014/11/beginners-guide-to-planning-multi-room.html
Yes. Any Wii MotionPlus should work with any Wii Remote and Wii.
Using non-endorsed Nintendo Wii software, you can make a European Wii console in a multi region one. ----
Indeed it does
Wii has got Multi region and PAL and NTSC If your wii is multi it will open any kind of games PAL-European somehow won't be able to play NTSC-American And the opposite applies
Yes!
Yes it is, but not on WiFi.
Level 50 in multi-player.
it doesn't have multi player for wii sorry
multi-user system
Unix is a multi user, multi processing and multi tasking operating system
Up to four wireless controllers can be synced to a Wii system.
no Actually, it is. Unix has multi-processing and multi-tasking capabilities.