The Clarity D714 is a new generation of amplified phone designed to offer communication solutions for the hard of hearing, visually impaired, and those with mobility issues. Features: Adjustable receiving volume control up to 40dB Adjustable receiving Tone control (4 tone settings) Add up to 4 Clarity D704HS additional handsets available here Answering machine DECT 6.0 technology for clear, interference-free communication Manage soft/loud sounds to produce clarity Minimize background noises Easy to see high contrast numbers Backlit keypad Large font and high contrast caller ID screen Extra loud and clear handset speakerphone for hands-free conversations 10 speed-dial buttons to store important numbers 100 name and number phonebook with 10 memory buttons 20 Last Number Redial memory Belt Clip for hands-free mobility Hear-It-Ring Clarity ringer has 10 loud and clear melodies plus 6 levels of volume. Both the large keypad and CID display light up as a super bright visual ringer