It has a 5"" backlit LCD display which is easy to read in low light conditions. Other features include hands-free speakerphone, flexible softkey operation, and redial. This system operates on a ""peer to peer"" system using a PTSN, T1 or SIP Gateway (sold separately) . This gateway eliminates the need for additional hardware. Set-up is quick and easy, easily customize the system with user friendly settings and configurations. SB67030 Features: New DECT 6.0 Technology - Interference Free Communication - Increased Clarity / Enhanced Security - Wider Range / Network Friendly, 1.9GHz Corded Phone - 30 Battery Life Increase Over 5.8GHz, SIP Voice Over Internet Protocol (VoIP), 1-16 Line Operation, Caller ID / Call Waiting, Digital Answering System, Speakerphone, Backlit LCD Display, On-Hook Dialing, 100 Station Phone Directory / Dialer, 3-Way Conferencing, Speakerphone Volume Control, Volume Control, Wall Mountable/Mount Included, Softkeys, Last Number Redial, Hold, Flash, Do Not Disturb, AC (110 v) Powered, Headset Jack, Can Handle up to 5 Simultaneous Calls, Automated Attendant, Up to 10 Calls Simultaneously, Upgradeable Software, Zone Paging"