Uniden TCX800 Accessory Handset for TRU8800 Expandable Phones (Silver/Black) For use with Uniden TRU8800-series phones except the 2-line TRU8866 100 caller ID and memory-dial locations Speakerphone and conferencing capability, call transfer Room/baby monitoring, walkie-talkie function Tri-lingual display; headset compatible, belt clip