V-Tech VTI5868 5.8GHz DSS Expandable Cordless Phone System with Caller ID and Extra 5807 Handset Dual 5.8 GHz handset telephone system with digital answering machine Caller ID/call waiting capable; 50-number memory 15-minute answering machine record time; 3 mail boxes Personalize ring tones by recording directly from PC or stereo equipment Headset compatible; powered by AA batteries