As removed from service.
Works as expected.  Includes a connector (no back shell)
Ships fast from our location in Long Beach, CA

The PS Engineering PM3000 is an FAA-TSO approved, 4- to 6-place high-fidelity stereo aircraft intercom system. It is approved under TSO-C50c for audio amplifiers and tested to RTCA DO-160C specifications. 
Technical Specifications & Configurations
Operational Modes