With this USB Mobile Expansion Hub a single USB connection to Windows ME, XP as well as 98 and 2000 based computers, provides instant attachment to the accessories you use most: mice, keyboards, printers, PDA's, scanners, speakers, cameras, telephones, joysticks and other items. There's no need to turn off your computer to add or remove devices-simply plug and unplug them as needed. The USB Mobile Expansion Hub features a self-powered stand alone USB hub with two USB ports, a serial port, a parallel printer port, a mouse (PS/2) port, a keyboard (PS/2) port and a power connection. The USB port replicator hub allows easy connection to your notebook computer on the road or at home.