Four cases with speakers, They are part of a Heathkit Intercom system. I thought at $1.50 each It was a bargain I couldn't pass up. I have one master with the top cover missing, and 3 remotes. Funny thing is there is just a speaker in the remotes, no electronics. In the master however there is an added power supply that was optional, (normally I guess the whole system runs on batteries) I also received the booklets for assembly.
I don't know if Ill Keep everything intact or just salvage it for the speakers?
I also saw a trutone intercom system at Goodwill but they wanted $4.50 for each station, so I passed on that but now I having regrets of not getting that also.
Those I believe were wall mounted wireless.
I'm a Science Thinker, Radio Tinkerer, and all around good guy. Just ask Me!