Federal Signal AD-27A Atkinson Dynamics Industrial Intercom, Talk/Listen Switch, Volume Control, Call Button, 120 VAC
Designed for single-channel two-way indoor and outdoor communication applications wall-mount intercoms feature integrated volume control talk/listen switch corrosion resistant cast aluminum housing with rugged powder coat finish (Type 4X IP56) reliable 25-watt speaker and a balanced line output. Heavy duty units are UL Listed CSA Certified and Marine Rated.