Interlogix NX-1820E NetworX Touch Screen Keypad, 3.5" Color Touch Screen, Icon-based Graphic Interface, Built-in Message Board, NetworX System Compatibility, 192-zone Capability, Modern DesignIdeal for almost any size application, the NetworX Touch Screen Keypad offers powerful yet simple control of any NetworX security system. An intuitive interface, 3.5" touch screen and Quick Keys for rapid system arming and status updates enable quick and easy system managementUsers can record their own names for different system components and leave voice messages for others when arming or disarming. When a NetworX proximity card reader (NX-1700E) is installed, users can easily manage access cards and authority levels from the convenience of the keypad Key FeaturesNetworX system compatibility3.5" color touch screen, Icon-based graphic interfaceQuick Arm, Stay and Status keysCustom text naming for user names, areas, zones, outputs and roomsAccess card management (when card reader NX-1700E is installedBuilt-in message board, Customizable chime groups for specific zonesSupport for up to 99 users, 8 partitions and 16 outputsStreamlined, modern design192-zone capabilitySpecificationsCompatibility: Interlogix NetworX control panels (NX-4, NX-6, NX-8, NX-8E)User Interface: Intuitive graphical interactive encased in a 3.5" color TFT LCD screenLanguage: EnglishOperating Voltage: 12VDC Regulated, supplied from control panelCurrent: 110mA nominal, 140mA maxWiring: NetworX 3-wire data/communication busOperating temperature: 32°F to 122°F (0°C to 50°C)Dimensions (WxHxD): 3.2" x 4.9" x 0.7"Color: Opal White with silver frame