Power-failure operation offers peace of mind during power outages. Large, tilt display & oversize buttons make it easy to make & receive calls. Audio Assist ™ feature increases overall volume & enhances sound frequencies to make speech easier to understand. Tri-lingual menus support easy interaction & user convenience. Compatible with most hearing aids. Lines: 1; Telephone Type: Corded; Caller ID / Type: Standard Display; Speakerphone: Base.