The Elvox® 6351 series monitors are designed to meet any requirement for video intercom systems. Surface wall mounted on a steel back-plate (supplied), It features a crystal clear, high resolution 625 lines, 3.5" Colour monitor, electronic tone signaling. 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. Handset with microphone, provides clear duplex conversation.