AT&T CL80109 Accessory Cordless Handset, White/Black | Requires an AT&T CL81109, CL81209, CL81309, CL82109, CL82209, CL82309, CL82409, CL82509, CL82609, CL82859, CL84109, or CL84209 Expandable Phone System to Operate AT&T DECT 6.0 Digital Accessory Handset Only; Compatible with CL81109, CL81209, CL81309, CL82109, CL82209, CL82309, CL82409, CL82509, CL82609, CL82859, CL84109 and CL84209 Handset Speakerphone Intercom Between handsets 50 Name / Number Phonebook Directory Large Lighted Display and Kepad on Handsets