Reliable, corded operation eliminates the search for a misplaced cordless handset, while sturdy construction ensures long-lasting performance. Clean design makes it an easy fit on any counter or wall. Allows you to view the name, number, time and date of incoming calls at a glance, even those on call waiting. Allow you to speak and listen without holding the handset. This leaves your hands free to do other things and lets more people in on the conversation. The telephone works without AC Power. For the Caller ID to function, four AA batteries (not included) are necessary. Large keypad numbers are easier to see when dialing. Both the ringer and receiver have volume controls so that you can adjust them to your comfort level. TIA-1083 Compliant is a higher standard for cordless phones than just being hearing aid compatible. This standard applies to cordless phones and is especially important when purchasing cordless phones for seniors, as many seniors wear hearing aids.