The AT&T TR1909 phone has simple, corded operation. The 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. Caller ID/call waiting allows you to view the name, number, time and date of incoming calls at a glance, even those on Call Waiting. The telephone works without AC Power. For the Caller ID to function, four AA batteries (not included) are necessary. Stores up to 13 phone numbers for easy dialing. Stores name, number, time and date of up to 80 incoming calls, whether or not the phone is answered. Numbers stored in the Caller ID history can be dialed directly from the memory. Redials the last number called with the touch of a button.