DRE-205e Premium Stereo Portable IntercomlTwo Place portable / built-in expandable intercom with outstanding, clean stereo soundlIndividual squelch circuits and PTT jackslStuck Microphone warninglAutomatic fail-safe pilot communication to radio with loss of power to the intercomlAccessory imputs for Stall Warning, Altimeter Alert, Collision Avoidance and Engine Monitor, etc. (for buit-in use)l Cell Phone interfacel No deteriation of sound as battery weakensl Powered by (2) 9 volt batteriesl Aircraft power input (on the side)l Completely compatible with mono or stereo headsets or a mixl Available mounting flanges allow installation in Ultralights and LSAl Aluminum caselMil-spec quality cablinglAudio input for for MP3 or CD Playersl Automatic music muting with manual overridelNo-risk 30 day money-back guaranteel3-year Warranty