FSK/DTMF compatible Caller-ID 80 incoming Memory 24 outgoing memory Real time clock with year, date & month display 12 digit Green / Orange Backlit LCD Display of incoming numbers, new call, total calls & repeat calls Basic calculator. Programmable Flash. Ringer volume control Switch. Anti line tapping. Music on Hold. Redial (31 digit Redial memory) Two-Way Speakerphone with programmable receive volume setting. DO NOT DISTURB for max 12 hours. Desk / wall mountable. LED for in use indication Pause.