Hear what others are saying while talking on the telephone; cordless design gives freedom to travel throughout the home; large backlit keypad is built in to handset and lighted ring signaler is on base and portable handset; sleek design with easy to see amplify button, telephone remains regular but amplifies when boost button is pressed and allows those with trouble hearing on regular telephone to enjoy clear and loud telephone conversations again. Amplifies to 40 dB one year warranty.