Rolm 66106 RP612 Phone (Black/Refurbished)Key Features: Supports 9 lines, 12 feature buttons, including lines and 10 LEDs Modular supports 2 bay options plus one Keyboard Expansion Option (KEO) Redialing, speed dialing, one way speaker for on hook and intercom dialing Call monitoring, conference calling up to 8 parties 2 external, various ring tones Call forwarding, transferring, call waiting, adjustable volume, muting Fully refurbished