Olympia OL5870 5.8Ghz Digital Spread Spectrum with Digital Answering Machine CID/Call waiting Single 5.8 GHz handset with base and integrated digital answering machine Caller ID/call waiting capable; 50-number memory; 5-number redial 3 mailboxes, 50-message capacity 802.11/Wi-Fi friendly phone will not interfere with your wireless network Headset compatible