Master handset for single or double-door intercom system works with door intercoms and sub-master handsets (sold separately) to enable audio communication with visitors prior to authorizing access
Handset accepts up to two sub-master handset connections to extend coverage to multiple rooms or over large areas
Slim handset provides privacy when communicating with the door intercoms and with connected sub-master handsets
Door release button controls an electric strike (sold separately) to remotely unlock the entrance for a visitor
Two- or four-tone chime with adjustable volume and LED indicator alert the master intercom operator to a visitor call