ATT-CL4940 Corded Answering System w/Large Display. Simple, corded operation. Line power mode. Display dial. Mute. Last number redial. Flash. Receiver volume control. Ringer volume control. Table- and wall-mountable. Hearing aid compatible. English/Spanish/French setup menu. Clearspeak® dial-in-base speakerphone. Caller ID/call waiting. Digital answering system. Backlit display. Extra-large buttons