This SupraMax adds the convenience of a USB connection to a brand already known for user friendly solutions. The one-step USB installation makes using the SupraMax a breeze. The customer just plugs it in and it's ready to go. It supports the 56K standard (V.90/V.92) for world-wide ISP support. Features Quick Connect, Modem on hold, PCM upstream , V.44 data compression, full featured data/fax external modem. No external power supply adapter needed. Comes with user manual on CD-Rom, Top rated Communications software, Internet access software, and top of the line fax software.