Panasonic KX-TG5212M GigaRange Supreme 5.8 GHz DSS Expandable Cordless Phone with Dual Handsets and Answering System 5.8 GHz digital spread spectrum signal Expandable to 4 handsets, 2 included Integrated digital answering system Caller ID/call waiting, 50-call history Handset speakerphone, 3-way conferencing