AT&T DECT 6.0 Black/Silver Digital Corded/Cordless Answering System (CL84109) AT&T DECT 6.0 Digital Corded/Cordless Answering System Clearspeak Dial-in-Base Speakerphone Handset Speakerphone Caller ID/ Call Waiting Capability Expandable up to 12 handsets through one phone jack