Thanks for your answer, Flipper!

The stereo system is from the '90's era. Will these wireless speakers work with something this old? I'm not being smart alec or sarcastic - will they be compatible? This is my parents' system and I want to play music from their era for their 60th wedding anniversary. I could use an iPod, but don't really have the time to load all the music with all the other preparations. Hopefully these wireless speakers will work.

Thanks Again for your help!