Motorola MD791 5.8 GHz Digital Expandable Cordless Phone with Corded Base and Answering System (Silver/Black) Cordless handset with 5.8 GHz digital signal; corded base unit Caller ID with visual call waiting on handset's LCD screen Phonebook includes 50 private listings and 48 shared listings 15-minute digital answering system with memo recording Expandable to 8 cordless handsets, 1 included; customized ringtones based on phonebook