Uniden DCT 648-2 2.4 GHz Expandable Cordless Phone with Dual Handsets, Answering System, and Caller ID 2.4 GHz digital signal with autoscan Expandable to 4 handsets, 2 included, extra charging cradle Integrated digital answering system Caller ID/call waiting compatible, 100-call history Handset and base speakerphones, intercom function