Polycom Soundpoint Pro SE-220 2-Line Conference Phone with Caller ID, Call waiting Mute, Speed Dial, LCD Display Easily switches between speakerphone, headset, and handset modes 32-character LCD display shows number dialed, length of call, and other useful information Caller ID with on Call Waiting, 36-entry phone book, One-touch speed dial and search/sort speed dialing 99-number incoming and outgoing call history directories let you easily access past call information FSK and expanded PBX message waiting indicator, Nonvolatile RAM protects stored information if power is lost