Targus AMU40US Retractable Optical Stow-N-Go Laptop Mouse (Grey/Black) Includes tilt-wheel with 4-way scrolling for easy navigation 2.5-foot retractable cord stows under the mouse for easy travel Programmable scroll button for zoom, magnify and more Adjustable cursor speed with a one-touch button Works with Windows 2000, XP, Windows Vista or Mac OS X or higher; USB port