1. Provides four downstream USB ports compatible with HUB USB 2.0 (low and full speed) devices.2. Top loading port allows you to easily access small accessories such as USB thumb drives, media readers, USB lights and fans3. Connect your modem, USB printer, scanner and HD to a convenient USB HUB.4. With a USB 3 port hub, you can add 3 USB peripherals to your computer and save desktop space5. Support Windows XP/ME/2000/98SE 98/Vista