â—† Quick and precise navigation: Scroll wheel and Microsoft Optical Technology let you move quickly and accurately through documents.

â—† 1000 dpi: High-performance 1000 dpi optical sensor delivers greater accuracy and control.

â—† Easy to set up and use: No software to install, no feature setup required.

â—† Comfort for right or left hand: Get a grip with a comfortable design created for either hand.

â—† DPI -1000 chip: 8733 the life of buttons: 300W wire: 2.8 * 1.2M leather line weight: 62g Suitable for: Office.

â—† Power source: Cable.

â—† Compatible operating systems: Microsoft Windows XP, Windows Vista, Windows 7