Logitech V500 Cordless Notebook Mouse 2.4GHz Micro-Receiver offers 30-foot (10m) range with virtually no interference or latency Expandable Chassis articulates 7 degrees to fit the hand while in use, and folds flat for travel 4-Way Scroll Panel reinvents the scroll wheel - Simply slide your finger across the solid-state panel for hyper-responsive vertical and horizontal scrolling All-Terrain Optical Engine offers superior surface coverage compared to lesser notebook mice Works for both PC and Mac