The PA400 ASC-T Intercom with Cell Phone capability contains a 3-way control switch, Pilot - all - crew for enhanced cockpit communications. Separate volume controls for pilot and crew.
New PA 400-ASC has increased audio levels along with auto power shut-off if pilots headset is disengaged. It can be used with monaural or stereo headsets, or any combination of headsets.
On/Off volume switch
Cell Phone Capability
Pilot isolate switch
Music In/Record Out jacks
Fail-Safe capability
Powered by two 9V batteries
Auxiliary power cord adapter
Measures 4" x 5" 1.375"
Three-Year Unconditional Warranty 
Weight: 16 ounces (454 grams)