The U222-004-R ultra small 4-port USB 2.0 hub is the most versatile and powerful hub on the market. This USB 2.0 hub allows you to connect up to four USB devices to a single USB port on a PC/Mac/laptop. Meets or Exceeds USB 2.0 Specifications for hi-speed data transmission rates up to 480Mbps. Perfect for both the desktop and mobile user. For the mobile user, this full featured hub with self stored cable is "pocket size" and an ideal solution the user on the go. For the desktop user, an extension cable has been provided so that the hub can be located within easy reach, wherever the PC is located. While the hub will function perfectly in virtually all cases without needing external power, a compact, multi-voltage AC adapter (110/220V ) has been provided for the rare circumstance when connecting a power hungry device. This USB 2.0 device is backwards compatible so that it will function with both USB 2.0 devices as well as USB 1.1 peripherals. Comes in a clamshell retail package.