The Elvox 6500 series monitors are designed to meet any requirement for video intercom security. Semi recess wall mounted on a steel back-plate (supplied). All monitors feature a crystal clear, hi resolution 625 lines, 5" B&W monitor, electronic tone signaling with three selective volumes and off, LED indication of off position. Heavy duty coiled cord, door release, monitor activation, accessory push buttons. Brightness and contrast control. Door release indicator LED can be used to show status of entry doors provided with switch contacts. Selective privacy, selective Coax or twisted pair video, AC or tone ring. Handset with electret microphone, provides clear duplex conversation.