AT&T DECT 6.0 Digital Four Handset Cordless Telephone with Answering System and Caller ID (SL82418) State of the art antenna technology for maximum range and clarity DECT 6.0 Digital technology for superior sound quality, security and range 4-handset digital answering system Speakerphone allows hands-free conversations 50-number Phone Book, 50-number Caller ID history