DESC: 5.8 Ghz Digital 2-Line Expandable Cordless System with Dual Keypad and Call Waiting/Caller ID. Expandable to a total of 10 Handsets. Additional features include Handset and base speakerphone, headset compatible, 7-way conferencing, intercom between handsets, room monitor, Directlink 2-way radio feature, backlit display, 20 ring tone options, personal ring feature, lighted keypad.