This Combo includes a USB Ultra Mini Optical Mouse and a USB 1.1 4-port micro swivel hub. This compact and lightweight USB 1.1 Micro Swivel 4-Port Hub comes with a swivelling connector to allow direct plug-in connection to your Laptop, Pocket PC, Tablet PC or Handheld PC. The BUS power mode eliminates the need for an AC adapter. The USB 1.1 hub supports both full speed (12Mbps) and low-speed (1.54Mbps) data transmission rates. This is one of the smallest and lowest cost USB v1.1 Hubs available today! The Targus Ultra Mini Optical Mouse (Silver and Blue with red LED) is just the thing for the mobile warrior that needs to save space when using an external mouse. At only 42.5g and 7.6cm long, this Ultra Mini Mouse is great for any small work space or on a small aeroplane tray. The Ultra Mini Optical Mouse conveniently comes standard with a USB connection (USB revision 1.1) that will allow true plug and play connection with the notebook USB port. And it's 100% compatible with Windows 98/Me/2000/XP and Macintosh operating system right out of the box.