The AT&T EL2131-21 DECT 6.0 Cordless Phone with 2-Handsets, Caller ID and Handset Speakerphone is built to give you all the features a busy household needs. With the ability to store up to 50 blocked contacts, the call blocker prevents your from receiving unwanted calls. See who's calling before you answer. Store up to 50 calls and display the name, number, time, and date of each incoming call. With the full-duplex handset speakerphone, you can talk and listen at the same time with natural, two-way conversations on both the handset and base. The 2-inch white display features high-contrast text, making it easy to read caller ID and call history. The orange backlit keypad on the handset helps you dial numbers evenly, eving in low-light conditions. Enjoy up to 10 hours of talk time or up to 5 days of standby on a single charge from the long-lasting rechargeable battery, so your phone is always ready. ECO mode manages power consumption so the system uses less energy and you get the best battery life. DECT 6.0 transmission gives you private, interference-free sound from any room in your home. This expandable phone system allows you create a phone setup that fits your home or office. Add more handsets as needed, transfer calls, and use the intercom feature to talk between handsets with ease.