The Panasonic KX TGE433B expandable Digital Enhanced Cordless Telecommunications (DECT) 6.0 Phone system with answering machine and 3 cordless handsets is a smart, reliable home/home office solution designed to make every day call management easier and more convenient for everyone, no landline required. Includes one cordless handset in the base unit and two additional cordless handsets, expandable up to six handsets (additional handsets sold separately). Large, white backlit LCD and dedicated volume control on the included three cordless handsets and base unit are ideal for enhanced visibility and hearing comprehension. One touch Noise Reduction suppresses background interference from callers in noisy locations. Keep tabs on the baby with built in baby monitor, and send clear, simultaneous announcements to every handset in the house with voice paging. Call Block conveniently blocks up to 250 bothersome caller numbers. Plus, Talking Caller ID tells you who's calling via advanced text to speech announcements, and a powerful battery backup system keeps you connected when the power goes out. Hear who's calling from across the room without having to get up using text to speech announcements in English and/or Spanish from the phones' base unit and portable wireless cordless handsets. Connect and converse hands free with crystal clear 2 way, full duplex speakerphone convenience designed into the wireless handsets. Attach an optional Key Detector to your key ring to locate lost keys. Simply activate the detector's beeping alarm from any cordless phone handset to instantly track down lost keys from up to 200 yards away. Easy call block, speakerphone, voice paging, power back up operation, and advanced TAD (telephone answering device) functions tie it all together making this system one of the most reliable and functional cordless phone systems available in the market today. Guided feature tutorials are available for this cordless phone on the manufacturer's website. DISCLAIMER: DECT 6.0 is a North American marketing term for Dect devices manufactured for the United States and Canada operating at 1.9 GHz. There are two basic methods available to program your phone. Display Menu Tree Method (Older Model Phones): This method requires pressing the Menu soft key then using the navigation arrows to scroll to the various menus and sub menus of the phone to select the desired programming feature. Direct Command Code Method (Newer Model Phones): This method allows access to the desired programming feature by pressing the Menu soft key, the pound sign, and a 3 or 4 digit number code found in the manual.