Targus Wireless Compact Laser Mouse, Black (AMW55US) Compatibility- Designed to work with Windows 7, 2000, XP, Windows Vista Mac OS X v10.4 or later Optical Sensor Technology- 1000 DPI high-precision laser sensor technology accurately responds to mouse movements Easy Storage- Stow-N-go design helps portability by keeping the USB port stored inside the body of the mouse Ergonomically Designed- Provides long lasting comfort due to its sleek, ergonomical form RoHS Compliant Limited warranty does not cover products purchased from 3rd party sellers