The hama usb 20 hub 14 bus powered in silver gives you an extra four ports this allows you to have more permanent devices like an external hard drive scanner printer or a keyboard constantly attached to your computer or laptop via the usb ports that are already available while having an extra four ports for other devices that need to be used the hama hub has the ports spaced far enough away from each other allowing you to use them all at once unlike some other hubs the cable on the h