Since this is based off of the Xai laser mouse, I just looked up a review of that mouse.
Excerpt from HardwareHeaven with pictures:
Turning over the Xai reveals a small LCD screen on the underside that
is not dissimilar to the screen featured on the CM Sentinel Mouse.
SteelSeries have taken things one-step further; the menu system not only
allows you to switch between profiles but also to configure almost
every aspect of the mouse that you can configure through the software.
In fact the only things you can’t access are the button assignments and
the macros.
This system is quite easy to use. To activate the system, you hold
down the CPI button for a few seconds and can then navigate through the
extensive menus using the mouse wheel. The only small niggle I have with
this system is that you have to turn the mouse over to use it which is a
little inconvenient if you want to switch between profiles in game. It
would have been nice to see the screen positioned on the top of the
mouse in a similar way to the CM Sentinel.

Full article: http://www.hardwareheaven.com/reviews.php?reviewid=896