I'm not a gamer so I'm having a hard time visualizing how this thing is intended to be used. Is this for your left hand?
[UPDATE] Based on a link in another comment I went to this site:
It's really weird. Every image shows a device that looks like it is intended to be used with your left hand, except for one tiny image of someone actually using the thing. In that image, they are using it with their right hand, and the device in that image looks like a mirror image of every other image on the page. WTF?