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. Multi-voltage design accepts 24VDC and 120/240VAC 25 watt speaker Call button sends call tone to other intercoms on the same audio line Type 4X IP56 UL Listed; CSA Certified; Marine Rated UPC 782979204749 Brand Federal Signal Color Grey Voltage 240 Volts Unit Count 1 Count Item Weight 9 Pounds Manufacturer Federal Signal Model Number AD-27A Power Source Corded Electric BuiltIn Media Intercom Mounting Type Wall Mount Control Method App Mfr Part Number AD-27A Smart Home Compatibility Not Smart Home Compatible Manufacturer Warranty Description 5 Year Manufacturer Global Trade Identification Number 00782979204749