A simple and convenient way to organize your phone system for home or office, the AT&T® 2-line Corded Speakerphone includes both caller ID and a digital answering system so that your calls are all recorded and easy to return. This corded base is compatible with headsets using a 2.5mm jack and includes 2 built-in phone lines as well as multiple ringtones so that each phone line is customized to maximize functionality. This simple phone is a great way to keep your phone system streamlined and user-friendly.