Corded / cordless phone system offers the best of both worlds with cordless mobility & corded reliability. Fully integrated answering machine makes it easy to screen calls & check your messages while away. Four, pre-set equalizer programs let you choose the sound quality that best fits your hearing. Easy-to-read display clearly shows phonebook & Caller ID information. Expandable system lets you put additional handsets (sold separately) wherever you need them. Compatible with most hearing aids. Answering System: Digital; Lines: 1; Telephone Type: Corded; Cordless; Caller ID / Type: Standard Display.