Uniden DMX778 2.4 GHz DSS Expandable Trendy Cordless Phone with Answering System and Caller ID (Silver/Black) 2.4 GHz frequency hopping digital spread spectrum signal Expandable to 4 handsets, 1 included Answering system with 30 minutes of recording time Caller ID/call waiting, 100-number caller ID memory Recordable ringer tones, distinctive caller ID options