Software

The Model O's software is pretty standard as I've seen more or less the same layout a few times before, but it does the job well. Just like the mouse itself, it's extremely lightweight as it takes up less than 5 MB of disk space and consumes just about 10 MB of memory while running in the background. Even though it's so resource-friendly, you can uninstall it if you don't want to have any extra software on your computer since the mouse has on-board memory to store all settings.

There's only one main screen, and it contains all the settings. In the bottom left, you can fiddle with profiles, create new ones, delete existing ones, and import and export them. Above these settings are all button-mapping options and the macro editor. The right side of the screen has drop-down tabs: the first contains the resolution options, and you can also set colors to each level—there's an RGB LED at the bottom plate of the mouse that lights up according to these settings. The Lighting tab controls the eye-candy—more on that in the next section. Moving on to the Mouse Parameters, this menu has the OS-related settings. Make sure to remove the tick for "Improve pointer precision" as it adds unwanted acceleration! You can also set the lift-off distance here; I'd advise leaving it at 2 mm unless you have pixel-skipping issues. The Polling Rate tab's name says it all, and Debounce Time should be lowered to 4 ms in order to reach the lowest-possible click latency—if you experience unwanted double clicks, you should increase this value.

Lighting

Glorious PC Gaming Race claims that the Model O is the lightest full RGB gaming mouse out there, and it sure has a lot of RGB functions. There are three lighting zones, and the scroll wheel and two shell-separator lines light up—you can't control these zones individually, though.

Eight different lighting modes are available, and there's the option to turn everything off, naturally. The lighting is bright, the colors are nice and vivid, and most of the transitions are very smooth. The Wave and Tail effects could be a bit smoother in my opinion, and I found nothing to nitpick on with the other modes.

Here's a demonstration video of some of the lighting effects: