DECT 6.0 technology; Bluetooth connectivity; expandable up to 5 handsets ; allows user to make & receive cellular phone calls on home phone ; pairs up 2 cellular phones ; operates with or without a landline service; interference-free digital technology ; 15-min answer machine recording time ; handset speakerphone ; call waiting caller id ; 9 speed-dial memory ; caller display stores information on the last 30 calls; 30-name/number phonebook; large backlit display ; extra comfortable handset with large 3-line display ; selectable ringer tone; dual handset system