Corded/Cordless DECT 6.0 Phone system with Visual LED Ringer, Caller ID Announce, and 1, 000 number Smart Call Block memory Photo dial: never forget whose number is whose. Program frequently dialed phone numbers and attach a photo to each one for convenient speed dialing. 50Db audio assist: temporarily increases overall volume by up to 50db and enhances sound frequencies that make speech easier to understand 90Db ringers volume: the extra-loud ringers makes it easy to header incoming calls throughout your home Big buttons, large display: oversized buttons and an easy-to-read display screen make the system super easy and comfortable to use