Dual Interface Wired Telephone: /DTMF dual system, call quality is stable and clear, very practical or office use. A of functions: volume increase and decrease, redial, return query, and calculation function that meet all you needs.Oversized Buttons: landline phone has enlarged button numbers for the elderly and visually impaired. Powered by telephone , no need to install battery, energy saving and environmental protection. the call quality is stable and clear, very practical or office use.Easy to Use: Connect the phone to your phone wall by the phone included in , No need batteries or AC/DC power. Can be placed on the desktop, providing many functions for convenient use. The call quality is stable and clear, easier to understand.High Quality Material: High quality ABS material, durable for long service life. Suitable for the elderly and the shortsighted people using, can be used at office, , hotel. At the same time, it can also be used as a housewarming gift for your , or your parents, so that you can with your at any time.Note: This is not a wall phone.color:BlackMaterial:ABSsize:170 x 90 x 34mmPackage Contents:1 x Landline PhonesOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.