Four-Port USB 2.0 Ultra Mini Hub lets you connect up to four USB devices to a single USB port on a PC, Mac or laptop. Certified by the USB-IF to support hi-speed data transmission rates up to 480Mbps, mini hub is perfect for both the desktop and mobile user. Self-stored cable is the size of a 3/8" thick credit card. For the desktop user, a provided extension cable puts the hub within easy reach wherever the PC is located. While the hub will function perfectly in virtually all cases without needing external power, a provided compact, international AC adapter (110/220V) connects an especially power hungry device. Hub is backwards compatible so it will function with USB 1.1 peripherals as well as USB 2.0 devices.