Corded Telephone Incorporated with Hearing Aid Compatibility, the AT&T 983phone decreases noise which provides clear discussion. With Last Number Redial, this AT& T 2-line phone stores the last number called on the phone for easy Redialing. Integrated with data slot, this AT&T orded phone allows simple connection to fax machines or modems. The AT& T 983 contains unique ringtones, which helps to tell apart calling coming in on both phone lines. This AT& T 2-line phone has speaker phone on base which lets you to make calls with the force of a button. This AT& T corded phone can be easily installed on Tabletop or wall. Speakerphone 3-Way conferencing Distinctive ring tones (to distinguish line 1 and line 2) Separate ringer controls Digital receiver, speakerphone, headset volume controls 24# Speed dial numbers Headset jack (2.5mm) Data port (switchable for lines 1 and 2) Mute / flash / hold / redial Line status indication Chain dialing Wall mountable Programmable pause Hearing aid compatible No AC power needed (4 AA batteries required, not included) Black