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. Fully integrated answering machine lets users screen calls & check message while away. Tri-lingual menus support easy interaction & user convenience. Compatible with most hearing aids. Answering System: Digital; Lines: 1; Telephone Type: Corded; Caller ID / Type: Standard Display.