(DAI Part# 40594G-01)
The permanent panel-mount module is designed for use with all "XP"
Series David Clark Company ENC headsets with exception of H10-76XP.
Designed for installation in the panel of a single aircraft and wired directly
to the aircraft's electrical power system. Operates with supplied power
ranging from 9V-31V. Features a protected on/off switch and offers a
choice of flush, surface or bracket-mount options.