The A867 Gaming Mouse is a nice affordable mouse with RGB lighting built into it. Since this is a low cost mouse, finding instructions are easy to find online but there is no booklet just images showing you the functionality.
To change or turn off the built in RGB lighting just hold the Mouse Scroll Wheel down + Button 6
As you can see in the image above, there are Special Combination Keys. You can change the DPI with just the click of one button so of your mouse is jumping all over the place don’t worry you just have to click through button 6 or 7 to switch through DPI settings.