This USB 2.0 Docking Station is a unique expansion unit specially designed to accompany notebook or desktop computers that have extra connectivity demands. With only one USB port required from a notebook/desktop PC, additional USB as well as conventional Parallel I/O, Serial I/O, LAN and PS/2 peripheral devices can be accessed.The USB 2.0 Docking Station allows you to add two additional high performances USB 2.0 peripheral devices to your PC. Furthermore, this product is fully backwards compatible with USB 1.1 products, which means your previous USB 1.1 devices can continue to function as well. You can also add additional hubs to accommodate up to 127 total USB devices. The benefits in using the docking station is to be able to utilize peripherals without needing to turn off the computer, not needing to connect several cables to your computer, and to avoid hardware setup and complex software installation. With the docking station, one can simply plug and play all kinds of USB/conventional peripherals at a time without worrying about the availability of ports or the need to reboot the computer.