Designed for seniors or the hearing impaired, the VTech SN5147 Amplified Corded/Cordless Senior Phone System with 90dB Extra Loud Visual Ringer, Big Buttons & Large Display comes with features to make hearing and dialing calls easier than ever. With big butttons, large displays, and a full-duplex speakerphone on each device, this senior-friendly telephone system takes the guesswork out of dialing calls. Attach a photo to each of the four phone speed dial buttons on the Photo Dial handset and call frequently dialed phone numbers with one touch for quick access to freinds and family. Increase the volume of incoming sound on this VTech SN5147 Amplied corded/Cordless Senior Phone System with 90dB Extra-Loud Visual Ringer, Big Buttons & Large Display by up to 50 decibels, making conversations easier to hear and understand. You can say goodbye to unwanted calls with this amplified telephone thanks to smart call blocker. Robocalls on your landline are automatically blocked for ever ringing through-even the first time. You can also permanently black list up to 1,000 numbers with one touch.