This BellSouth CI-7112 Visual Director Caller-ID with Voicemail Control is a must-have for any home or office. With its sleek white design and 3.5 mm Jack connector, it's easy to use and provides a variety of features to enhance your calling experience. It has a single line and an interface for DSL (RJ-11) connection. This Caller ID Display Box has an impressive list of features including Call Waiting, Battery Backup, visual call ID, Voice Mail, Zoom, Caller ID, and Hold. With these features, you can easily manage your calls and never miss an important message. This device is perfect for anyone who needs to stay connected and organized.