AT&T CL84102 DECT 6.0 Expandable Corded/Cordless Phone with Answering System and Caller ID/Call Waiting, Black, 1 Corded and 1 Cordless Handset DECT 6.0 Technology. Caller ID Announce. HD Audio. Caller ID/Call Waiting  Stores 50 Calls Up to 14 Minutes of Digital Recording Time Expandable System up to 12 Handsets (Uses CL80111 Accessory Handset) Refer instruction manual before use. 50 Name and Number Phonebook Directory For optimal performance batteries should be charged for 16 hours prior to use