Uniden D1680 DECT 6.0 with Caller ID and Call Waiting: * DECT 6.0 technology * Digital answering system * ECO Mode intelligently manages power consumption * Caller ID/Call Waiting * 50 number caller ID memory * 100 name/number phonebook memory * Last 5 number redial * Handset speakerphone * Backlit keypad and display * Intercom or call transfer between handsets * Expandable up to 12 handsets with 1 phone jack * Silent mode * 7 day standby * Personal ringers * Wireless network friendly * Compatible with DRX100 range extender