Product Details:
5.8 Ghz 2 Line Expandable Digital Cordless Answering System Features: Call Waiting Caller ID Shown On Handset (where Available; Requires Subscription From Your Local Phone Service Provider)
Voice Enhancer Technology (adds Lost Frequencies Back To Voices)
2-line Operation
5.8 GHz Digital Spread Spectrum Operation
multi-handset Operation (add Up To 7 Optional Handsets For A Total Of 8)
built-in Digital Answering Machine With Up To 60 Minutes Total Record Time
3-line Backlit LCD Display On Handset
Chain Dial ? Link Programmed Numbers Together (such As Calling Cards) For One-touch Dialing
50-entry Phone Directory
50-entry Caller ID Memory
handset Speakerphone
base Speakerphone
4-way Conferencing (between Handset, Base Unit And 2 Outside Lines)
NiMH Rechargeable Battery (up To 5 Hours Of Talk Time Per Charge