The Doorking 1802-090 is a Electronic Programmable Directory to surface mount. 1802-EPD stores up to 100 telephone numbers and names. Th3 1802-090 has single-line 16 character LCD directory. DoorKing's 1802-EPD (Electronic Programmable Directory) is an ideal telephone entry system that is loaded with features and is suited for applications that have limited space and can be used in residential as well as commercial applications. The 1802-091 is designed for applications that do not require a directory, or in applications where a separate directory exist and includes a built-in electronic directory. Visitors are easily identified by voice communication and can be granted or denied access directly from a touch-tone telephone.