Review: GameSir GM300 Wireless Gaming Mouse (Hardware)

Reviewed by Prans Dunn, posted Jun 4, 2019, last updated May 31, 2019
Jun 4, 2019
Next up in our wireless peripheral reviews is the GameSir GM300! As a wireless mouse dedicated to gaming with replaceable counterweights, upto 16000 DPI, ambidextrous comfort, a mandatory customizable RGB backlight, and a relatively affordable price point, is this product worth considering to game, sir?
Prans Dunn


GameSir has been expanding its inventory of late. Beginning with controllers, the company now boasts even more controllers, keyboards, mice and mice/keyboard combos! You might have come across some of them already among our official reviews, and today we’ll be taking a look at the company’s GM300 wireless gaming mouse.

What’s in the box?


In the Box:

  • 1* GameSir GM300 Wireless Gaming Mouse
  • 1* Pair of Magnetic Counterweight (6.5g each for left and right)
  • 1* Pair of Standard Side Plate (left and right)
  • 1* Pair of Enhanced Side Plate (left and right)
  • 1* Agility X 2.4GHz Wireless Dongle
  • 1* Type-C Cable
  • 1* User Manual

Tech Specs

  • Brand: GameSir
  • Model: GM300
  • Connection: Wired / 2.4GHz Wireless
  • Working Platforms: Windows PC (Windows 7 or later) / macOS
  • Battery Capacity: built-in 500mAh rechargeable Lithium battery
  • Working Voltage: 5V
  • Adjustable 5-level DPI: 400/800/1600/3200/16000
  • Frame Rate: 5000fps
  • Acceleration: 50G
  • Polling Rate: 125Hz (8ms) / 250Hz (4ms) / 500Hz (2ms) / 1000Hz (1ms)
  • Connectivity: USB Type-C
  • Cable Length: 5.91 ft.
  • Package Size: 8.66*6.30*2.56 in.
  • Gross Weight: 0.75 lb.

At a glance

As a wireless tech enthusiast, I was happy to get my hands on a wireless mouse, more so given that it is geared towards gaming. It operates via a USB dongle that is innovatively stored in a little tray hidden under the mouse which can be accessed via a switch. While being an innovative and a cool storage concept, to actually detach the tray from the mouse (it attaches to a slot in the latter via a magnet) requires quite of a reach. If you don’t have long enough nails, it can be quite of an inconvenience.


If you don’t want to go wireless or the built-in battery is low, you can still go traditional and plug it to your PC via the provided USB cord (the mouse itself sports a USB-C port). This is also how you’ll charge the mouse’s built-in 500mAh battery, with a full charge taking about 2 hours. However, the included cable is shaped in such a way that it plugs into the mouse only in one direction, which kind of defeats the purpose of including a USB-C port in the first place...


A closer look

Once connected, the GM300 is ready to use. As a daily driver, it is more than enough. I mean, what much more would you need other than right/left clicking and scrolling to browse the net and what not? The handy DPI switch below the scroll wheel will also allow you to adjust the speed to your liking when not gaming. I did note that whenever I would put my PC to sleep and subsequently wake it up, the mouse itself would not automatically wake up. I always need to manually click on one of its buttons in order to use it after a period of hibernation. I'd very much like to be able to just use the mouse and pointer right away as I do with my wired mouse but it seems like this is unfortunately not possible with the GM300...

Obviously, it does not end there. With 4 customizable buttons and adjustable backlight, you can make the GM300 truly yours with your desired lighting and button shortcuts for your favorite games.

I also appreciate that the RGB lighting is not overdone. GameSir only included it under the scroll wheel and the logo of the company. Rather minimalist for a gaming device, right? This minimal philosophy also aligns with the overall design of the mouse which is coated with a matte black finish all over. Given the $50 price tag, the company also went minimal with the plastic material of the shell which nevertheless does not feel overly cheap but also not totally robust. The Omron mechanical switches also provide a nice clicky feel when in use and with up to 20 million keystroke lifespan, you will surely be clicking away for quite some time with the GM300.

More on the customizable font, the GM300 comes loaded with two counterweights, 6.5g each, which easily attach to the underside of the device via magnets, allowing you to adjust the device’s weight and acceleration for enhanced precision. You can also swap plates between standard ones and enhanced ones, which are basically thumb rests and thankfully, the company made this available for both right and left handed users. This is quite refreshing as the latter demographic is often left out of the consumer market. Those plates are also held by strong magnets and can quickly be swapped on the fly. This fast, easy and totally optional customizable aspect of the GM300 hardware was one of its highlights for me.



Running the GameSir G-Core software will further allow you to customize the RGB lighting to your liking from a 16.8 million color palette but more importantly, this software is your gateway to configure the DPI levels (up to a staggering, and dare I say unnecessary, 16,000 DPI), adjust macro settings and remap keys.

Now onto what most of you have been waiting to be answered: what about latency? Well, the GM300 uses what GameSir touts as their “Agility X 2.4GHz wireless technology” which provides wireless connection with “1ms ultra low latency and 1000Hz polling rate”. The company coupled this with an optical sensor with up to 16,000 DPI and 50 G acceleration. What does this all mean? Well, from my experience, it meant that I cannot feel any difference between the GM300 from a wired mouse. The mouse has been responsive for every game I threw at it from Killing Floor 2 to The Evil Within 2 to We Happy Few. Of course, I’m not into competitive gaming and latency will be an important concern among those of you who are into such games but I haven’t come across any latency. And if you are just looking to rid your gaming desk from the jungle of wires and tangles that comes with every new piece of tech, then the GM300 will definitely help in clearing territory without impeding on performance.


+ Highly customizable and modular
+ Responsive
+ Ambidextrous
+ Affordable
- Plastic finish
- Does not automatically wake up after using PC following a sleep period
- USB dongle tray needs quite a reach to access
- Oddly shaped USB cable included
out of 10
With its variety of customizable options and price point, the GameSir GM300 is a worthwhile consideration to add to your gaming gear, with the bonus of being wire-free.

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