Just a mouse ah, a little big, get used to it. I am a counterweight above, because just to buy less than two days to move when lost weight that box assembly, take down counter weight don't know where. Has been used now, more than three years, also did not feel heavy, maybe because I with the big mouse pad, covered the table don't have to carry the mouse. Recently bought a new logitech trackball mouse, new buy this not funny games, other occasions with habits are the same. It's just not portable. Buy it if it looks good or if it's fun.