AT&T Basic Phone Two-line speakerphone offers Caller ID/Call Waiting capability, a speakerphone, 4 x 16 character backlit display, three-party conferencing, 100 name/number directory, distinctive ring tones, separate ringer controls, receiver/speakerphone/headset volume control, 18-number speed dial, rapid scroll, line status indication, data port, hold, mute, flash, automatic line selection, chain dialing and programmable pause. Caller ID/Call Waiting features include 99 Name/Number Caller ID History, visual message waiting indicator, new call indicator, entry removal button and display dial. Speakerphone is hearing aid compatible and headset compatible (2.5mm).