Intercom, Wall Mount, 12VDC, Talk/Listen Switch, Volume Control, Microphone Ready - Heavy-duty industrial intercom for indoor or outdoor applications. Single channel, two-way communications. Balanced line output. 25 watt speaker. Cast aluminum housing with rugged powder coat finish. Available in 12 or 24VDC and 120 or 240VAC, 50/60Hz. UL listed, CSA Certified, Marine Rated. Type 4X, IP56 enclosure.