Panasonic KX-TG2730S 2.4 GHz DSS Expandable Cordless Phone with Answering System 2.4 GHz signal, frequency-hopping digital spread spectrum technology Expandable to 8 handsets, 1 included Built-in digital answering system Caller ID with call waiting; 50-number directory 4-line LCD with easy menus; handset speakerphone