Farfisa provides 3.5 “graphic LCD display module with 4 backlit function keys. The electronic index function for displaying and calling system users is integrated. The capacity is 1000 users, to each of which the address of the internal device of the system must be associated in case of Duo System. Also, the “Alias” feature is included in the phonebook. It can display current data and time, moreover it is possible to program PIN access codes according to various time schedules.