The Panasonic KX TG4500B is an expandable 4-line 5.8 GHz FHSS GigaRange Expandable Corded phone. It's a combined digital phone and digital answering system, supplied with 1 additional cordless handset. Give your small business an advanced business telephone system, without the high price -- and with no expensive wiring or installation. Up to 8 individual mailboxes, with separate greeting messages 100-minute total recording time Time/Date stamp Call Transfer, Message Transfer, Deliver Message and Auto Message Delete Remote access with voice prompts Call Waiting Caller ID 50-Station Caller ID memory 100-station phone directory & dialer Requires HHR-P104 Replacement Battery (not incl.)