Panasonic DECT 6.0 Cordless phone has all the right elements: The backlit amber LCD screen and lighted keypad is easy to see even in the dark. Program up to 30 numbers in the call Block list to eliminate calls from unwanted sources. The dedicated intercom button makes room to room communication a snap. Eco mode ensures the longest battery life possible. Can be expanded to a 6-handset system. 4 handsets: 1.6" Amber backlit screen and illuminated keypad for easy reading and dialing even in low lighting conditions Call blocking function lets you easily block up to 30 telephone numbers Intelligent Eco mode extends battery life for longer talk time when close to the base unit Hands-free speakerphone and dedicated Intercom button for extra convenience Night mode allows you to select a period of time during which the handset will not ring; Frequency Range: 1.92 GHz - 1.93 GHz. Number of Channels 60 Channels