The CL595 hearing-impaired telephone is not only compatible with hearing aids but can also be set to a particularly loud volume for better hearing. In addition to hands-free mode, four speed dial buttons (three of which have photos), an emergency call function (the SOS button automatically dials four phone numbers in sequence until someone answers), adjustable speaker settings, and reception volume, mute function, and pause function, this analog phone stands out with its large buttons and text, as well as high contrast, ensuring excellent usability. The answering machine can be set to German, English, French, and Dutch. You can block up to 100 unwanted numbers, and all private or unknown numbers can also be blocked. Conversely, you can activate the VIP function to accept incoming calls only from specific contacts (up to 50 numbers).