Uniden DCT 6485 2.4 GHz Expandable Cordless Phone with Base Keypad, Answering System, and Caller ID 2.4 GHz digital signal, expandable to 4 handsets Integrated digital answering system Supports caller ID with call waiting, 100-call history 20 distinctive ring options, 10 tones and 10 melodies Handset and base speakerphones; intercom function