estate item, FM wireless intecom (carrier current), channel C, I only found one of htese, usually there is a pair - the blue "C" in a circle identifies the channel.  These were great, in the days before cell phones, I had a unit like this and used it a lot.

Note to me: 3rd drawer RH cabinet

I normally ship within 24 hours of your order, but the post office does not always initiate tracking when I put the packages in the drop off box.  

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