Hey; I recently benefited from a business closing down and throwing away lots of stuff in their store. I found this thing that looked interesting so i took it, but honestly I don't know what it does. Maybe I do; I think its a PA system but even then I don't know how to use it. If somebody could give me an example or some info on how to start using this thing it'd be swell. Here are some pictures of the type I found and some reference, thanks.
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