DESC: NUTONE IM-110WH-2 PLUG-IN INTERCOM - 2-PACK.FEATURES:PLUG-IN INTERCOM - 2-PACKCompact 7-1/4" x 4-7/8" x 2"2 unit set3 channel FMUses up to 8 stationsVoice activated "Auto" key for total hands free operation, or use the key to monitorAdvanced circuit for clearest reception with no drifting"Auto" key is for listening in on baby or invalidBuilt-in filters reduce interference from fluorescent lights, appliances&dimmersThumb wheel volume control with "off" setting allows adjustment at each stationMove and use wherever there's an AC outlet. 500 ft. rangeBoxed