Accessory handset with Caller ID and Call Waiting provides reliable long-range coverage for excellent call clarity. Handset speakerphone leaves your hands free to do things and lets more people in on the conversation. Backlit LCD displays the name, number, time and date of up to 50 incoming calls. High-contrast black text on a white background provides an easy-to-read screen to view incoming Caller ID or review call history. Noise-filtering technology allows you to take calls virtually anywhere without sacrificing sound quality. Handset is designed for use with the AT&T two-line answering system with dual Caller ID and Call waiting (sold separately).Accessory handset with Caller ID and Call Waiting provides reliable long-range coverage for excellent call clarity. Handset speakerphone leaves your hands free to do things and lets more people in on the conversation. Backlit LCD displays the name, number, time and date of up to 50 incoming calls. High-contrast black text on a white background provides an easy-to-read screen to view incoming Caller ID or review call history. Noise-filtering technology allows you to take calls virtually anywhere without sacrificing sound quality. Handset is designed for use with the AT&T two-line answering system with dual Caller ID and Call waiting (sold separately).