Up for sale is a Northern Airborne Intervox AA80-020 4-Place Intercom. Technical info is as follows:
P/N: 3230015-3
S/N: 21001
MODS: None
Volts: 13.75 27.5 VDC
The unit was in working condition when removed. Missing knobs. If you have any questions, please feel free to ask! Happy buying!