Ultrafast MagSpeed scrolling. Remarkable speed, precision & quietness of electromagnetic scrolling with all new MagSpeed Wheel - up to 90% faster, 87% more precise & ultra quiet. Wireless Bluetooth connectivity. Connect the way you want up to 3 devices via Bluetooth or the included USB receiver on Windows, Mac or Linux. Darkfield 4000 dpi sensor. Hit the right pixel every time with Darkfield 4000 dpi sensor. Faster and 5x more precise than the basic mouse. Track on any surface. The 4000 DPI sensor means you can track virtually anywhere even on glass.