The D1685-3T comes with an intuitive user interface, digital answering system, three handsets, & titanium finish. Expandable up to 12 handsets using 1 phone jack. Base includes keypad & Live Talk Speakerphone. Handset speakerphone. ECO Mode intelligent power management. Silent Mode (Ability to turn all handset ringers on or off at a touch of one button). 50 name/number Caller ID memory. 100 name/number Phonebook memory.