Phone Handset, 2-Line, 5.8 GHz,3-Way, for MD7081, Silver Two-line 5.8 GHZ FHSS System Phone with Caller ID and Answering Device is expandable to eight handsets. Handset includes visual call waiting, 50 private phone book memory locations, handset to handset intercom, hands-free intercom, answering machine access from handset, three-way conferencing, room monitor, phone company voice mail waiting indicator. Backlit keypad, four-line display, visual antenna ring indicator, hold and mute buttons, headset capable and belt clip. Base includes digital answering machine, base keypad, handset locator, answering access from remote telephone and speakerphone. Wall mountable. Battery back-up requires four AAAA batteries (not included).