CHOOSE YOUR ANGLE - The adjustable tilt on the V628X allows you to achieve the maximum comfort and ergonomic benefits from your mouse. Tilt the angle of the mouse from a range of 53 to 73 degrees to adjust the vertical positioning to your liking. MODIFY USING INCLUDED SOFTWARE - Utilizing the included software (for Windows only) we offer with this mouse, users can modify the mouse to their liking, by changing the DPI setting, button commands, macros, LED settings and more. **NOTE**Only basic functions of this mouse will work on Mac OS, NO software available. The V628X mouse is suitable for large hands, medium hands please search V628P vertical mouse; for small hands please search V628M-2.4G vertical mouse. 4 ADJUSTABLE DPI SETTINGS - Switch between DPI levels 600, 1200, 2000 and 4000 to adjust mouse responsiveness depending on your need and/or preference. Optical Tracking Technology ensures greater sensitivity for precise tracking on a wide range of surfaces.