[. . . ] [. . . ] An advanced high precision 1600 dpi laser sensor can track on a variety of surfaces better than an optical device even on tricky polished or wood-grain surfaces. It's the best choice for notebook users to take with them, and you can easily place the mini receiver inside the mouse for travel. The 4D scrolling roller provides fast browsing in left, right, up and down on the Internet. Combining high technology in a fashionable slim design, Traveler 915 Laser is your best choice for a notebook. [. . . ] [. . . ]