Connect-to-Cell Answering System connects up to four Bluetooth cell phones to make and receive cellular calls. Once a Bluetooth device is paired to the included base, they will automatically connect when the device is in range. DECT 6.0 digital technology delivers unsurpassed range and clarity. HD Audio takes sound quality to the next level. Expandable system includes two cordless handsets, one charger, one telephone line cord, two AC adapters and two battery packs. System expands up to 12 handsets. Download up to 6,000 cellular phonebook entries to the cordless handsets. Push-to-Talk feature allows instant and easy communication between handsets. Use up to four handsets on a call, call transfer using the intercom and intercom between handset. Cordless telephone system also includes Call Waiting/Caller ID, 50 name/number Caller ID history, last 10 number redial, handset speakerphone, voice mail waiting indicator, 14 minutes of digital recording time, call intercept, and remote access.