A4Tech optical usb mouse OP-620D

The A4tech optical wheel Mouse with hyper-fast scrolling for increased productivity. A nearly frictionless scroll wheel lets you fly through long documents and Web pages with a single flick. Experience smoother cursor control on virtually any surface. Contoured design give you more support and control._x000D_
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SPECIFICATIONS_x000D_
Model:OP-620D_x000D_
Type: Wired_x000D_
Ergonomic Design: Symmetric_x000D_
Sensor: Optical_x000D_
Resolution: 1000 DPI_x000D_
Buttons No.: 4_x000D_
Port: USB_x000D_
Cable Length: 150 cm_x000D_
System Requirements: Windows XP / Vista / 7 / 8 / 8.1 / 10