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Vincent Alzieu Published on March 1, 2011
Translated by Catherine Barraclough
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  • Sensor Laser
  • Wired? / Docking Station? yes / no
  • Battery Fil
  • Maximum Resolution 5000 dpi
  • Reporting Frequency 500 Hz
We were impressed with the Radon 5K as soon as we unwrapped it. The finish is much better than we were expecting, with buttons and scroll wheel that are nice, precise and firm without being clunky. On the whole then, the Radon 5K is pleasant to handle. Plus, although it's been designed for right-handed users, the left-handers in our offices still found this mouse nice to use.

From then on, the nice surprises just kept coming!
  • A small wheel is used instead of the traditional buttons to change sensitivity on the fly. This makes a nice change. You can define several steps of 100 to 5600 dpi.
  • The mouse glides like a dream when it's new. We even wrote to Ozone to ask if they'd found some kind of magic technology, but no, they said, it's just down to good slider pads.
  • Thumb buttons are well placed and nicely well designed.
  • At 12 cm long, this mouse feels comfortable in the hand. Your palm rests on it nicely and there's no strain on the wrist.
  • We liked the matte black finish—we're sick of cleaning shiny mice!
  • We loved the original cable-guide underneath the mouse! Why hasn't anyone thought of that before?
  • Still on the underside, there's a handy set of removable weights.

Ozone Radon 5K review
The red arrows show the five different positions the cable can be held in.
It's an original and practical feature. The only downside is that it's a bit fiddly.

Practical Tests

The Philips laser sensor used in this mouse is really quite good! As a rule, gamers need mice with a laser that can keep up with fast movements. On a bad gaming mouse, or a mouse intended solely for office-based computing (like the Apple Mighty Mouse), the sensor can't keep up with movements faster than 1.5 metres per second, which isn't all that fast. In fact, action-based games often require movements of 2 mps while expert gamers can reach 3 mps. And—we've seen it with out own eyes—a very fast 'pro' gamer can move at 4 metres per second.

During our tests, the Ozone Radon 5K hung on in there up to 5.8 metres per second, which is one of the best scores we've ever seen! In comparison, the excellent Logitech G500 only manages 4 mps, which we already thought was impressive enough.

The second interesting thing we noticed about this mouse is that CPU use is unfortunately rather high. At 500 Hz, we noticed it was using 35% of the power of our dual-core Intel processor, and that got nearer 50% at 1000 Hz. It often drops to levels much lower than that but, like the Tt Esport Black mouse, CPU use isn't continuous. In fact, it varies all the time in relation to the speed with which you move the mouse and the level of acceleration. CPU use therefore fluctuates in peaks and troughs, sharply shifting from 30% to 80% when you start to accelerate! The peaks are brief, and they're so quick that they shouldn't really be a problem. However, as fast movements are usually made at critical times when gaming, it's not the ideal time for your mouse to slow down the game, even if only for a very short time!

The Driver

The driver is good and is relatively easy to use (except for assigning buttons, which can take be a bit tricky the first few times). You can customise seven of the eight buttons, plus there's a simple macro creation module. Here, we were pleased to see that you can enter very long macros! You won't often need to do so for games, but for photo editing or office computing (gamers don't game all the time you know!), this can be handy for things like automatically entering frequently used phrases or chunks of text, for example.

Unfortunately, we do have to end this review on a bit of a sour note. The sliders on the underside of the mouse that we couldn't get enough of when we first started using it just didn't stand the test of time. After a few weeks of use, the mouse became nosier and heavier to use. The manufacturer was right it seems, there's no magic solution in this mouse, and those 'amazing' slider pads aren't quite as good as we initially thought. Plus, it's not like the slider pads can't be easily replaced, as they're not available to buy as an optional extra and no spare set is supplied with the mouse.
Ozone Who?
Ozone is a Spanish brand that designs products based on a concept that's no-longer unique but still pretty nice, since its peripherals are designed by gamers for gamers, based on their long hours of experience and their specific needs. Ozone also aims to make sure its products affordable while still offering high-end tech specs.


  • Excellent performance for fast movements and accelerations
  • Easy-to-use driver with plenty of options (profiles, macros etc.)
  • Eight buttons (seven can be programmed)
  • Original and practical cable-guide
  • Impressive glide ... when it's new!


  • More expensive than the Logitech G500, which is still our favourite
  • Slider pads wear out quickly
  • Basic scroll wheel: click-round steps and no sideways movement
  • High CPU use, with peaks at 80%
  • Driver could be better-designed


The Ozone Radon 5K is a very nice mouse that's only held back from a five-star score by a few small details (basic scroll wheel, CPU usage etc.).
4 Ozone Radon 5K DigitalVersus 2011-03-01 00:00:00
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