Corded digital base telephone includes one cordless handset and is expandable up to six handsets. Operating in the 1.9GHz frequency range, DECT 6.0 phone will not conflict with other wireless devices such as computer routers, wireless keyboards, microwave ovens and other common household devices. Digital technology delivers long range and clear sound while deterring eavesdropping. Corded handset allows you to make and receive calls during a power outage. Call block stores the Caller ID info of any and all unwanted callers into your call block list. Silent mode lets you program each handset to ring or not at your discretion. Phone system offers digital answering system, three-way conference capability, ringer ID, light-up indicator with ringer/charge alert, lighted handset keypad, speakerphone on handset and base, 1.8" LCD, four-step talk volume, six-step speakerphone volume, headset jack, and 10-number redial memory. Battery life lasts 12 hours of talking and six days in standby mode.