DPI vs. CPI, what's the difference you say?
All laser mice out there, even those marked as "gaming mice" have their sensors measured in DPI (Dots Per Inch). This is a measure of how many dots of data are collected in one inch of mouse movement. To most consumers this seems right and it can certainly sell a mouse fast if it's sold marketing a high DPI. Little do most people know, but DPI is actually a term that originated in the printing world! It's primary use is to measure the resolution of printers, scanners and monitors. I read many dictionaries on this term and nowhere was I able to find any mention of it being a measurement term used for mice. CPI on the other hand is a term that stands for Counts Per Inch and on a mouse this means how many counts of data are sampled per inch of mouse movement. Seems more logical doesn't it? Doing a search on CPI I was able to find more info about mice and mouse sampling. So as we have it, SteelSeries isn't trying to make some flashy new term to sell their mice to gamers, they're simply setting the record straight and being one of the first mice manufacturers to actually use correct terminology when giving the specifications of their mice. On that note, the Ikari laser has a CPI of 1-3200 and can be adjusted in increments as fine as 1CPI!

More new terms; FPS vs samples per second
Another new term that SteelSeries is tossing around with this mouse is Samples Per Second instead of the Frames Per Second (FPS) that other mice manufacturers are using. The difference here isn't just terminology but actually the way the Ikari operates compared to most laser mice. Traditional laser mice will essentially "image" the surface every so many times a second (the FPS rating) and compare these "images" to create the movement of where the mouse is to go. SteelSeries has changed this method slightly and the Ikari mouse takes samples, 40 000 per second, to process your movement. This method is much faster and more efficient than creating so many huge frames every second.

FreeMove is a software-based pointer precision option that is in the Ikari software. FreeMove allows you to enhance the precision by correcting your movement. You can choose between 7 steps, depending on how much you want to be corrected. This correction is done by allowing the computer to do some of your movement in conjunction with the movement you do. This can allow for much smoother moving in those times where you don't want the mouse to exactly recreate every move you make.