The Targus USB Mobile Mini Hub is the smallest and lightest standard four port hub in the world. This compact and portable unit measures just 4.5"x1.5"x1" and weighs only 2.5 ounces. The Targus USB Mobile Mini Hub utilizes Plug and Play technology providing fast and easy connection to multiple devices without the inconvenience of having to restart your computer. In seconds you can attach up to four USB devices such as a mouse, keyboard, printer, numeric keypad, scanner, or digital camera. The Mini Hub allows most devices to be powered by the computer through the USB port. An AC adapter is included if additional power is needed.