Used, works great, runs off of 10 D cell batteries, FSN 5830-688-6633, serial no. A2811, contract no. M00027-73-C-0074, MFR- Barrett Intercommunication Products Corporation, Brooklyn, NY. Original box, 16.5" x 12" x 10", speaker is handheld with microphone attached to the back or can be separated, 24 ft of cable included.
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