Octopus extension is great for bulky USB devices like thumb drives that won't work with standard hubsx. Great on laptops with hard to reach USB ports. Ideal USB expansion for portable use on the road or at home. Perfect for connecting USB 1.1 or 2.0 peripherals such as USB mice, USB Portable Hard Drives, USB CD-R/RW or DVD-ROM drives and USB 1.1 hubs! Allows simultaneous operation of up to four separate devices all attached to a single USB port. Plug and Play.