Aiphone LEM-3 Open Voice Selective Call Master Intercom
Master intercom works with any combination of up to three door or sub-master intercoms (sold separately) to enable audio communication with visitors and other rooms within the building
Three buttons with LED indicators allow the master intercom to direct a call and communicate with the desired door or sub-master intercom
Listening feature allows the master intercom operator to receive audio transmission from a door or sub-master intercom at any time
