The form of this mouse fits in both left and right hand. This mouse has 6 buttons. The normal left and right buttons a wheel that clicks and 2 in the thumb area ( if you are right handed) and one more little button just behind the wheel.This is great especally if you like playing games. No installing software this is a plug and play mouse. There are 4 colors that can glow around the edge of the mouse to show the chosed DPI (dots per inch) red=1000,green=1500,blue=2000 and orange=4000 DPI.