Mouse Retractable HQ Millenia K009

 Resolution up to 1000 DPI
>>> The optical wheel mouse is a 3-button optical point device wich does not use a tracking
        ball as traditional mouse.Instead, it uses an optical sensor and digital signal processor
        to read and follow your mouse mover; eliminates erratic cursor movement and saves
        your time on cleaning your mouse.

>>> Enjoy enhanced features like the optical engine for stable and accurate cursor
        movement, magic-scroll for fast browsing on the internet and windows document,
        program the thumb button to assign popular step-saving shortcuts.

Optical Sensor
Sends signals to digital signal processor to determine location

Scroll, click, and zoom
The "Magic-Scrool"Button can be used for fast browsing up/down documents, as well as zooming in Microsoft Office and Internet Explorer.