Targus Mini Kaleidoscope Optical Retractable Mouse (AMU0503US) Brighten up your desktop with a mouse that cycles through colors continuously or shows the color of your choice Mouse on the go: Small and compact design allows you to use this mouse wherever space is limited Retractable cord: Avoid extra cable cluttering your workspace by adjusting the retractable cord System Requirements: Windows 2000, Vista, Me, XP, Windows 7, or Mac OS X, USB Port