PANASONIC KX-TG2970B GigaRange SecurityLink Plus Expandable Answering System Provides control of an ADT Safewatch 3000 Pro Security System form the phone handset or base 2.4 GHz Frequency-Hopping Spread Spectrum (FHSS) Emergency keys on base and handset (Fire, police and medical) Expandable to 3 cordless handset stations All-Digital Answering System - Flash memory message backup, voice menu and time/day stamp