Pilot PA200-E 2+2 Place Expansion Intercom Details:
The 2 place intercom that can be a 4 place intercom.
Because of the success of the PA 200, Pilot have made an expandable version for your additional crew. The PA 200E is effectively the same as a PA-200 but with a plug-in expansion module that allows two additional stations. A sturdy detachable cord with 3.5mm plug connects both components.
This makes the PA-200E not only the smallest 4 place intercom around but also the cheapest.