In order to solve the problem of required number of USB ports, it is necessary just to purchase a USB hub – a small device with several USB ports connected directly to one of USB ports of a PC. The USB hub makes it possible not only to connect more peripheral USB devices, but also to reduce the mechanical wear of USB ports of a computer, as well as it facilitates the process of their use. 4-port SVEN HB-401 and SVEN HB-444 USB hubs of SVEN Company provide not only three additional USB ports to a user, but they enable also to solve a problem to place connected peripheral USB devices and the hub, because the USB cable length built in hubs makes 1.2 meter.