The Panasonic Expandable KX-TGB850B Corded Telephone with Cordless Handset and Answering System is an essential phone for any home. With both corded and cordless handsets, it is incredibly versatile, letting you comfortably make and receive calls anywhere in your home. Its large backlit LCD display and intuitive keypad ensure that you can see and complete every call with confidence. Despite its small size, the phone is incredibly powerful, with Caller ID, Block, Phonebook, Redial, and Speed dial -- the functions you need at your fingertips. Line Power Mode keeps this phone functioning even during temporary blackouts. Powerful everyday long battery life provides 180 hours in Standby and 9 hours in Talk. DECT 6.0 technology ensures the clarity of each call even when the handset is in a different part of the home than the telephone base. Optional Handset: KX-TGBA85B. Key Features: Telephone system provides both a sturdy base unit and a light, compact handset for office or home; connect additional cordless handsets (KX-TGBA85, sold separately) Dial easily on a large, comfortable numeric keyboard; an easily findable red button lets you permanently block up to 50 unwanted callers, stopping telemarketers and other unwanted numbers Use the handset and base unit to create speakerphone for a home intercom system; keep handset in baby’s room to use as an audio monitor Caller ID (may require additional service from phone company), Phonebook (70 items), Redial list (10 items) and Speed dial (2 numbers) Large LCD display with Intuitive design makes phone’s features easily accessible; displays in English, Spanish, and French