Two-handset cordless phone delivers long-range coverage & clarity, provided by a unique antenna design & advances in noise-filtering technology. Choose from four preset audio profiles or use the equalizer to personalize bass, treble & natural tones for your individual hearing needs. This system doubles as a multiple-handset walkie-talkie to instantly communicate with up to four units in your home. Handset speakerphone allows you to speak & listen without holding the handset. This leaves your hands free to do other things & lets more people in on the conversation. Phone is expandable up to 12 handsets with AT&T 80101 accessory handsets. Caller ID / Call Waiting function is equipped with a 50-name / number Caller ID history. High-contract backlit LCD on handset displays the name, number, time & date of incoming calls. Phone system also includes DECT 6.0 digital technology, nine-number speed dial, last 10-number redial, voicemail waiting indicator, mute & any key answer.