Hearing aid compatible: This large button phone is designed for people with low to medium hearing loss. If you wear a hearing aid, set it to T to use during calls. Loud ringtone: The Dallas 20 rings up to 70 dB, making sure you notice incoming calls. A dedicated ringtone indicator adds visibility. No power socket required: The phone does not need mains power; simply connect it to your phone line. Photo buttons: Three speed dial buttons with adjustable photos allow you to dial a loved one, health professional, or emergency services quickly. Alarm clock function: The Dallas 20 automatically sets the correct time and can ring at a preset time, serving as an alarm clock. Large buttons: 12 mm high digits on wide, well spaced keys reduce dialing mistakes. Amplified reception: Adjustable reception volume up to 25 dB. If you have trouble hearing, press the Boost button to amplify the handset. Large backlit display: Easy to read alphanumeric display with a white backlight that runs on a battery. Contrast is adjustable with five levels without opening a menu. Use scenarios: - At home, an elderly user with hearing loss answers calls using a hearing aid,迅 quickly dials family or doctor via photo buttons, and uses Boost for clearer conversations. - In the morning or during routines, the built‑in alarm clock helps with reminders and wake-up calls. - In dim lighting, the large backlit display and big digits simplify dialing and reading numbers accurately.