Wireless Gaming Mouse Series

Logitech G900 & G903 Review

The Logitech G900 and G903 are some of the most uniquely shaped mice we have ever reviewed. Their high-performance specs matched with elegant exterior make these wireless mice truly tournament ready.

by Shaun

Wireless Gaming Mouse Series

Logitech G900 & G903 Review

The Logitech G900 and G903 are some of the most uniquely shaped mice we have ever reviewed. Their high-performance specs matched with elegant exterior make these wireless mice truly tournament ready.

by Shaun

by Shaun

With the rise in high performing wireless mice, the need for wires is fast becoming a thing of the past. Logitech has been delivering our wireless needs for quite some time now and that’s not changed with the Logitech G900 Chaos Spectrum. It doesn’t matter if you are right or left handed you can do away with the wires without sacrificing performance. Logitech went quite unconventional with the design of the G900 giving it a modular feel, almost as if you could take it apart in 4 different ways. Beneath the sleek shell though there are professional-grade specs that do all they can to offer you a high performing wireless experience. It features the PMW3366 sensor which is brilliant and clock-tuning technology to enhance speed and battery life.

It’s a gorgeous mouse and with its impressive engineering, it comes with a fairly hefty price tag of around £90/$90. Despite current competition from other manufacturers and Logitech’s newer releases this mouse still performs insanely well.  The side buttons can be removed and replaced with magnetic plastic covers making it truly ambidextrous. The battery is solid and you can extend its life in the software if you tweak the settings. If you’re a fan of the quirky but functional design, highly responsive switches, and an infinite scroll wheel then the G900 could be the wireless mouse for you.


  • Unique Design – Looks like no other.
  • Comfortable and Ambidextrous – Sits in either hand nicely.
  • Great Performance – No issues with this sensor.
  • High Quality – Well built and feels solid.
  • Software – Intuitive and easy to use.
  • Powerplay ready – (G903 only)


  • Price – Quite expensive for what you get.
  • Extra Grip – Some rubber grips in the thumb groove would be a welcomed change.
Logitech G900 Wireless Review


Mouse Size & Weight (G900)

  • Weight: 107g
  • Size: Medium
  • Length: 13 cm – 5.1 inches
  • Width: 6.7 cm – 2.6 inches
  • Height: 4 cm – 1.5 inches
  • Hand Orientation: Ambidextrous

Mouse Tech (G900)

  • Sensor: PMW3366 Optical
  • Buttons: Omron D2FC-F-7N (20m)
  • DPI: 200-12000
  • Polling Rate: 125 / 250 / 500 / 1000Hz
  • Connection: Wireless
  • Battery Life: 24-32 hours
Logitech G903 Wireless Review


Mouse Size & Weight (G903)

  • Weight: 110g
  • Size: Medium
  • Length: 13 cm – 5.1 inches
  • Width: 6.7 cm – 2.6 inches
  • Height: 4 cm – 1.5 inches
  • Hand Orientation: Ambidextrous

Mouse Tech (G903)

  • Sensor: PMW3366 Optical
  • Buttons: Omron D2FC-F-K (50M)
  • DPI: 200-12000
  • Polling Rate: 125 / 250 / 500 / 1000Hz
  • Connection: Wireless
  • Battery Life: 24-32 hours

What’s in the box

Logitech G903 review

The mouse comes in a very high-quality box as you would expect that flips open much like a watch box. The product is featured on the front along with some performance features on the back.

Inside the box you get:

  • G900 Chaos Spectrum  / G903 mouse
  • USB charging cable (only works with Logitech Products)
  • USB wireless connector
  • USB extender
  • 2 magnetic button covers
  • Warranty

Size & Weight

The G900 is what we would call a medium sized mouse, which is very close in size to the G Pro and Rival 650 (see table here). It has a length of 13cm making it slightly longer than the G Pro but a huge millimetre smaller than the 650. It sits in between the G Pro and 650 by width and depth also at 6.7 x 4 cm.  You can’t customise the weight with this one as you can in other Logitech mice, which is a shame. At 107 grams it’s the same weight as the G703 and feels surprisingly light to hold. There was little resistance moving this mouse across the desk and I had no issues with prolonged usage. It actually glided easier than the Razer Mamba wireless (106 grams) when used on the same mouse pad. The G900 moved with ease across my desk and I would say if you prefer using the mouse as an extension of your arm then this may be a good choice.

With the G903 however you can customise the weight like you can in a lot of Logitech mice. It comes with a little 10-gram puck of metal that slots in the circular panel, which can only be used if the ‘PowerCore’ battery isn’t being used (we will go into this a bit later).

Shape & Texture

The G900 has a truly unique design as it’s not based on any previous Logitech mice. The mouse remains comfortable regardless of what hand you use and its distinctive look livens the desk. It’s ambidextrous so it doesn’t quite fit in the hand as nice as an ergonomically designed one would. Despite that, it’s been designed with comfort in mind and its smooth grooves and sharp edges are a masterful touch. The hard outer shell kind of resembles a space-age beetle and is made of thin robust plastic. It looks as though the primary buttons and body of the mouse are two separate entities working in harmony which is a very attractive feature. The sides of the mouse are curved to accommodate for either thumb and feature contoured grooves in the plastic for extra grip.  The front of the mouse feels as though it flows into the body at the back, which is a nice evenly raised mound that would sit in anyone’s palm comfortably. The matte plastic is actually quite easy to grip and I don’t feel this mouse would slip but these added groves on the side really keep this mouse firmly in your hand.


The G900 comes with some button customisation and you can configure the mouse to have anything between five and nine different options. You can remove thumb buttons entirely if you wished or keep them all in, it’s completely down to you and they are magnetic meaning its really easy to swap out your different options as they snap onto the mouse without any trouble. The mouse comes with some magnetic plastic covers to swap out which makes sense depending on where your ring and pinky finger sit while holding the mouse. Its worth noting that even with all the buttons still in the mouse I never once accidentally pressed the side buttons while playing CSGO with a palm grip. Due to the mouse’s design, I also found it impossible to hit these buttons with the claw or finger grip too but I would be wary if you are used to a shorter mouse.

With the G900, Logitech introduced a mechanical pivot button design that gives you fast and reliable clicking with a durability of 20 million clicks. There is a metal spring tensioning system working with pivot hinges to give the left and right Omron switches a rapid and clean click. They feel solid and the low actuation was welcomed as I began to feel a nice consistency to my clicking in game.  The G903 uses a similar set of Omron switches however they are newer and can last up to 50 million clicks.  Aside from the main switches, you have the option of four thumb buttons (two on each side), a scroll wheel that can be used in three different ways and two DPI shifting buttons. Logitech again features their signature hyper scroll wheel and its functionality can be changed with the click of the button just behind. This button allows you to change the scroll wheel from tactile precision to an ‘infinite’ spinning wheel, which we actually found useful for scrolling the web or documents at work. Some gamers have used this feature in game creating a rapid fire for semi-auto weapons. The scroll wheel also offers side to side clicking which is not easily misclicked meaning extra functions you can program if you needed to. The DPI buttons will allow you to change your settings on the fly/ in-game if required and there is a button on the underside of the mouse that will allow you to jump to a differently configured profile.

Mouse Features Section

  • Optical Sensor & DPI – discussing what sensor is used, link to our sensor page if necessary, discuss the mouse DPI choices and link to DPI page if necessary
  • Main Switches – what switches the mouse uses, good or bad e.t.c.
  • Polling Rate – what polling rate the mouse has, good or bad e.t.c.
  • Connectivity – if wired USB vs port and wireless Bluetooth vs receivers and is it easy to connect/setup
  • Game Types – whats the mouse recommended for, is it an FPS killer or a MOBA destroyer
  • Lift Distance – discuss LOD, test e.t.c.

Sensor & Performance

I am always curious to see if an ambidextrous mouse gives a decent enough level of performance when it comes to a game. So I had a play around in CSGO to test and see if the mouse truly was a viable option. The Chaos Spectrum comes equipped with the PMW3366 optical sensor which is held in high regard and was featured in Logitech’s wired G Pro and wireless G703 along with a few others until the implementation of the New HERO sensor. I have used the G Pro Wireless with the HERO sensor and I obviously couldn’t notice much of a difference in performance. There was no acceleration or jitter while testing this mouse, the sensor tracked extremely well at all times even with the rigorous movement which could be down to it having 40g max acceleration and a great IPS speed of 300. I found small transitions in-game simple to make and large flashy flick shots were accurate despite using a new mouse. The main negative to this older sensor is it draws more power and runs the battery down quicker which could directly impact performance if you didn’t keep on top of charging this device. That being said the mouse seemed to handle fast movements with ease and I never noticed a dip in the overall performance once. The chaos Spectrum connects to the wireless receiver with a speed of 2.4GHz and I couldn’t detect any lag from the mouses 1ms polling rate which used to be common issues on old wireless mice.

Battery Life & Charging Time

The battery life of the Chaos spectrum is excellent and it really did feel it could last as long as it says. I was religiously checking the battery percentage throughout the day to see how quickly it would go down and I wasn’t disappointed. The battery lasts 24 hours but if you disable the RBG lighting in the software you can get up to 32 hours of uninterrupted playing time, which makes it handy if you were off to a tournament or friends house over the weekend. The clock-tuning in the software doesn’t just benefit battery life it also prolongs the mouse its self as they claim altering the different options can prevent degradation from temperatures and humidity.

The G900 will take 2 hours to charge and it’s been estimated by Logitech engineers that it can withstand 800 charges before beginning to degrade. This gives the average gamer a good 3-4 years of confidence in the mouse battery. The battery is fantastic and after using it as my main work mouse I found I only had to charge it every 4 days. The mouse efficiently goes to sleep after a certain amount of inactivity and it would snap back into action as soon as I even touched it again.

The G903 can also be used in a normal wireless mouse fashion but it has an exciting wireless feature that you can tap into. If you possess the Logitech Powerplay mouse pad, combine your G903 with the PowerCore module you get and you’re now basically wireless forever. The Powerplay module slowly charges your mouse even while you play wirelessly and just in case you didn’t fancy taking the pad with you don’t worry the charging wire will allow you to play! The ‘PowerCore’ module is a puck of plastic similar to your current Logitech weight holder however the PowerCore is a lightweight battery you can easily swap out. It is a superb wireless solution and one to consider if like me you forget to stick your mouse on charge or would just rather not have to think about it anymore.

Mouse Testing Section

  • Paint Test
  • CPI Divergence
  • Perfect Control Speed
  • Speed Related Accuracy Variance
  • Polling Rate
  • Input Lag
  • Click Latency


The Logitech software is where you can tailor the mouse to your specific needs. For instance, you can change the different preset DPI options in the software then you can change between them using the DPI switch. You can set up different profiles for different games, create macros and change the RGB lighting effects or just turn them off entirely. Using the software you can also monitor the battery life of your mouse. The G900 has onboard memory so you can save these settings to the mouse and it will then be game ready wherever you take it even if that PC doesn’t have LGS.

You can read our Logitech Gaming Software guide right here.

Our Verdict

If you want a high-level wireless mouse that won’t let you down for performance then the G900/G903 is a seriously good option. You would be getting an ambidextrous mouse that is not only very comfortable but its design is flawless and you can customise the button layout. Now if you are considering getting the Logitech Powerplay mouse pad then you should 100% get the G903 however if saving an extra £20 sounds better and you aren’t too fussed about regularly charging your device the cheaper G900 is probably a smarter choice. It’s never just down to performance with mice; weight and shape are crucial too and with the uniquely shaped design, they really are a beast that performs as good as the rest. Well worth a look at!

Leave a Reply

Your email address will not be published. Required fields are marked *