The Fysic FX-5520 makes calling easy. The extra large, backlit keys make the device easy to use, even in the dark. It has room for up to 50 contacts, to easily get in touch with your loved ones. The large, lit-up display with caller ID makes it instantly clear who's calling you. You adjust the ringtone and call volume to your preference, so you won't miss a single call. It won't be necessary to cut off your conversation early, because the FX-5520 has a battery that lasts up to 10 hours. And if you're busy during your conversation, you can just call hands-free.