Depending on the sound system and microphone there has to be a few things
if there is a USB slot (Google it if you dont know what that is) on the system and your microphone has a USB drive then it will work I have heard of other ways though
This question is a lengthy one. To be more specific you would need to consult your owners manual or have somebody do it for you.
Here's the basics:
Media Source - DVR, DVD Player, Video Game...
Now a days, that's just about every brand. If you go to the websites of some of the brand names and look at their receivers they list all the connections on the back.
YES! it can. depending on how far away you are, if anything else is operating on the same channel your wireless unit is on. if your battery is going ect ect...