AT&T CL2939B CL2939 Corded Speakerphone, Black ATTCL2939B ATT CL2939B, Power-failure operation offers peace of mind during power outages. Large, tilt display and oversize buttons make it easy to make and receive calls. Audio Assist feature increases overall volume and enhances sound frequencies to make speech easier to understand. Tri-lingual menus support easy interaction and user convenience. Compatible with most hearing aids. Answering System: N/A; Lines: 1; Telephone Type: Corded; Caller ID/Type: Stanard Display., UPC 650530020155