The M55 RGB Pro weighs in at a meager 0.2 pounds (86g). With the software, you get six profiles, where you can configure the CPI manually.

Without iCUE installed, it’ll increase CPI levels in 100 increments. South of the scroll wheel is a CPI switch button for letting you change the mouse's responsiveness on the fly. Either side of the body has a textured plastic finish (although it feels a bit rubbery), helping to strengthen your grip. The latter is often covered by your palm when in use, so the RGB lighting feels more like an afterthought, rather than something integral to the mouse’s overall look outside of a photoshoot.Ĭonstruction materials are generally very good. Only two parts of the mouse light up: the light under the scroll and the Corsair logo. This symmetrical design ensures comfort for both hands, and, of course, it also means you get two extra buttons compared to the Rival 110 –- if you don’t mind reaching for them.Īs with pretty much every gaming peripheral released these days, the M55 RGB Pro packs in that cliche RGB lighting, which you can adjust using Corsair's free iCUE software. While the Rival 110 only has additional buttons on the left-hand side (a strange choice for an ambidextrous mouse), the M55 RGB Pro has two buttons on each side by the thumb rest.

In fact, it looks a heck of a lot like another budget gaming mouse, the SteelSeries Rival 110 ($23/£25 at the time of writing), except for one key difference. Corsair’s packing in a PixART PMW3327 optical sensor, which features a max CPI (counts per inch, sometimes called DPI) of 12,400, can trundle along at 5.5 meters per second / 220 IPS (inches per second, or the max velocity at which your sensor can still track those counts) and has a max acceleration of 30 g-force, meaning for a budget mouse, this thing is capable of some seriously high precision, regardless of how quickly you’re tearing it across the desk. Corsair M55 RGB Pro (Black) at Amazon for $24.49 (opens in new tab)ĭespite its simplistic design, there's a lot of intuitive features tucked away here that can make the M55 RGB Pro a worthwhile addition to any gamer’s arsenal.Yet, to those that see the gaming mouse as an essential bit of hardware that can mean the difference between victory and defeat, the M55 RGB Pro may seem somewhat uninspired. It’s a refined take on what a mouse should be. There’s no fuss here, no gaudy shapes, or ridiculous illuminations, despite the RGB.

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