Panasonic KX-TG5431S 5.8 GHz DSS Cordless Phone with Answering System (Silver/White) 5.8 GHz digital spread spectrum signal All-digital answering system Caller ID/call waiting, 50-call memory and dialer 50-station phone book; flash, redial, and hold functions 2 downloadable ring options, 3 tones, 4 melodies