The Gigaset E310 Duo features large, backlit buttons, an illuminated display, and an extra loud, clear sound. This landline phone is also compatible with hearing aids. These functions make this handset suitable for elderly people. The large address book offers space for 120 contacts. Thanks to the large font, you can easily see which numbers you're pressing. Do you like keeping your hands free for other tasks when you're making a call? The hands-free function allows you to conduct a phone call via the integrated speaker.