Altoids Tin Mini Speakers
I love just about every project that’s built around the Altoids tins. This one is no exception: mini speakers made of recycled headphones. You could also use those cheap mini-speakers that they sell at your local electronic parts store.
Altoids Tin Mini Speakers [link]
by Robert
"The distance is very far. I would have no doubt that you could control it from 100ft -200ft or more. ..."