Uniden TRU8866 5.8 GHz Digital Expandable 2-Line Cordless Speakerphone with Dual Keypads (Black) 5.8 GHz digital signal; expandable to 10 handsets, 1 included Caller ID/call waiting, 100 shared caller ID and memory-dial locations Call conferencing, room/baby monitoring; tri-lingual menu options Supports 2 lines; dual keypads and displays; 10 speed dial presets Base duplex speakerphone, handset speakerphone