STEELSERIES ENGINE 3
Since CDs are no longer part of any bundle you will need to head over to the official SteelSeries support page to download the latest version of the Engine 3 control software.
SteelSeries is testing a new service called CloudSync. This service allows you to store all settings online so you can access them from wherever you are.
Unlike the previous SteelSeries Engine software the new version auto checks and installs new firmware updates to the device.
The Engine 3 control software allows you to remap all 6 buttons (and the scroll up/down if you want), create new macros via the macro editor, set the 2 sensitivity levels from 50CPI and up to 6500CPI, set acceleration/deceleration (or leave it to zero), play around with angle snapping and you can also configure the polling rate.
Of course you can also adjust the illumination of the two zones as seen above.
The illuminated sections are not very large thus not very impressive but it's certainly better than nothing.