Now your business or home office can have more productive conference calls with the clarity and convenience of a top-quality full-duplex speakerphone-in the same device that brings the full power of the Internet into your desktop computer at amazing speeds. Windows® PC Compatible, ISA PC Slot, External powered speakers required for speakerphone feature. V.90 56K ITU standard and X2™ technology, 3Com USRobotics Connections™ CD-ROM included.