Get insider access
Preferred mouse store
Your browser is not supported or outdated so some features of the site might not be available.

Cooler Master MM731 Mouse Review

Tested using Methodology v1.0
Reviewed Nov 11, 2021 at 10:47 am
Cooler Master MM731 Picture
8.1
Office/Multimedia
8.6
Video Games (FPS)
7.8
Video Games (MMO)
9.0
Ultra-Light Gaming
8.5
Travel
Connectivity Wireless
Type
Standard

The Cooler Master MM731 is an extremely lightweight wireless gaming mouse with a solid plastic shell, two side buttons on the left, and a single RGB lighting zone in the logo on the palm area. It has a comfortable, right-handed shape suitable for all but small-sized hands using a claw grip, medium and large-sized hands using a palm grip, and large or extra-large hands using a fingertip grip. It feels well-built overall, but it flexes slightly and creaks when you squeeze the body, and there's a faint rattle if you shake the mouse. Also, the scroll wheel feels stiff, and the scroll wheel click takes slightly more force to press than on most gaming mice. Performance-wise, the MM731 has very low click latency, a very low minimum lift-off distance, and you can adjust the CPI by increments of 100 within a very wide range.

Note: Many users online have reported a range of issues with the Cooler Master MM731, including but not limited to difficulty updating firmware, squeaky clicks, double-clicking, slam-clicking, high motion latency, and high click latency. In our time testing, we didn't experience these issues on the unit we tested. Cooler Master has stated that these physical issues are mainly present in earlier batches (specifically batch 1212 and 2123.) The unit we purchased is from batch 2128, which Cooler Master claims has been reworked to address the quality control concerns. They also claim recent firmware updates should fix any sensor issues, including motion delay and slam-clicking, but we'll continue to monitor the situation and update this review as needed. We performed our tests with the Cooler Master MM731 firmware version 2.0.9 and receiver firmware 1.2.8 installed. If you own this mouse and would like to share your experience, we'd love to hear from you in the discussions section.

Our Verdict

8.1 Office/Multimedia

The Cooler Master MM731 is very good for office and multimedia use. It feels well-built overall and connects wirelessly with its USB receiver or via Bluetooth. You can also use it wired with its charging cable. It has a comfortable, right-handed shape suitable for all grip types, and you can program all buttons using the customization software. Unfortunately, the scroll wheel lacks L/R tilt buttons and a free-scrolling mode.

Pros
  • Feels well-built overall.
  • Comfortable, right-handed shape suitable for all grip types.
  • Connects wirelessly with its USB receiver or Bluetooth.
  • All buttons are programmable.
Cons
  • Scroll wheel lacks L/R tilt buttons and a free-scrolling mode.
8.6 Video Games (FPS)

The Cooler Master MM731 is an excellent FPS gaming mouse. It's very lightweight and feels sturdy overall. It has a comfortable, right-handed shape suitable for all grip types, a flexible paracord-like cable, and mouse feet that glide smoothly on mousepads and desks. It also has excellent click latency, a very low minimum lift-off distance, and a very broad CPI range. Unfortunately, you can't adjust the CPI as precisely as you can on some other gaming mice.

Pros
  • Feels well-built overall.
  • Extremely lightweight.
  • Low click latency.
  • Comfortable, right-handed shape suitable for all grip types.
Cons
  • Mouse feet are thin compared to most gaming mice.
  • CPI only adjustable by increments of 100.
7.8 Video Games (MMO)

The Cooler Master MM731 is good for MMO gaming, but it doesn't have nearly as many side buttons as a dedicated MMO gaming mouse, but all the buttons it does have are programmable. It feels well-built overall and has a comfortable, right-handed shape. Performance-wise, it has very low click latency, a very low lift-off distance, and a very broad CPI range. Unfortunately, you can't adjust the CPI as precisely as you can on some other gaming mice.

Pros
  • Feels well-built overall.
  • Low click latency.
  • Comfortable, right-handed shape suitable for all grip types.
  • All buttons are programmable.
Cons
  • Not nearly as many side buttons as a dedicated MMO gaming mouse.
  • Mouse feet are thin compared to most gaming mice.
  • CPI only adjustable by increments of 100.
9.0 Ultra-Light Gaming

The Cooler Master MM731 is an outstanding ultra-light gaming mouse. It's extremely lightweight and feels well-built overall. Its right-handed shape is comfortable and suitable for all but small-sized hands using a claw grip, medium and large-sized hands using a palm grip, and large or extra-large hands using a fingertip grip. It also has a flexible paracord-like cable and mouse feet that glide smoothly on mousepads and desks. Performance-wise, it has very low click latency, a very low lift-off distance, and you can adjust the CPI by increments of 100 within a very wide range.

Pros
  • Feels well-built overall.
  • Extremely lightweight.
  • Low click latency.
  • Comfortable, right-handed shape suitable for all grip types.
Cons
  • Mouse feet are thin compared to most gaming mice.
8.5 Travel

The Cooler Master MM731 is excellent for travel. It's relatively compact and connects wirelessly either with its USB receiver or via Bluetooth. It feels well-built overall and has a comfortable, right-handed shape suitable for all grip types. There's also a compartment for storing its USB receiver on the underside, and it has onboard storage for carrying over custom settings to computers without the software installed.

Pros
  • Feels well-built overall.
  • Comfortable, right-handed shape suitable for all grip types.
  • Connects wirelessly with its USB receiver or Bluetooth.
Cons
  • Bulky; may not fit in most laptop cases.
  • 8.1 Office/Multimedia
  • 8.6 Video Games (FPS)
  • 7.8 Video Games (MMO)
  • 9.0 Ultra-Light Gaming
  • 8.5 Travel
  1. Updated Nov 11, 2021: Review published.
  2. Updated Nov 09, 2021: Early access published.

Test Results

perceptual testing image
Design
Design
Style
Lighting Color RGB
Design
Shape
Length 4.8" (123 mm)
Height 1.5" (39 mm)
Width 2.7" (69 mm)
Grip Width
64 mm
7.6
Design
Portability
Volume
20.14 inยณ (330 cmยณ)
Cable/Receiver Storing
Yes
Design
Weight
Maximum Weight With Wire
100 g
Maximum Weight Without Wire
60 g
Minimum Weight Without Wire
58 g
Weight Distribution
Centered
Extra Weights
No

For our Maximum Weight tests, we stored the receiver inside the mouse, while for our Minimum Weight Without Wire tests, we removed the receiver and the small trap door covering the receiver storage compartment. The door covering weighs 0.31g, and the receiver weighs 1.6g.

7.5
Design
Build Quality
8.5
Design
Comfort Of Use
Right-handed
Yes
Left-handed
No
Ambidextrous
No
Coating
Matte
Finger Rest
No
Design
Palm Grip: Hand Size Recommendation
Small Hand
No
Medium Hand
Yes
Large Hand
Yes
X.Large Hand
No
Design
Claw Grip: Hand Size Recommendation
Small Hand
No
Medium Hand
Yes
Large Hand
Yes
X.Large Hand
Yes
Design
Fingertip Grip: Hand Size Recommendation
Small Hand
No
Medium Hand
No
Large Hand
Yes
X.Large Hand
Yes
10
Design
Wireless Versatility
Bluetooth
Yes
Receiver
Yes
Battery Type
Rechargeable
Use When Charging
Yes
On/Off Activation
Auto Off And On/Off Switch
Receiver Extender
Yes
Battery Indicator No

Cooler Master advertises the battery life on the Cooler Master MM731 is up to 190 hours connected via Bluetooth with LED lighting off and up to 72 hours connected with its USB receiver with LED lighting off.

9.0
Design
Cable
Cable Length 6.2 ft (1.9 m)
Cable Type
Paracord-like
Permanent Kink
Yes
Port Type: Mouse End
USB-C
Port Type: PC End
USB
8.5
Design
Mouse Feet
Gliding Experience
Good
Material
Virgin Grade PTFE
Extra Included
No

The feet on the Cooler Master MM731 glide well on both mouse pads and directly on desks, but they make a slight scratchy noise on both, and the feet are thin compared to other gaming mice.

Design
In The Box

  • Cooler Master MM731
  • Wireless USB receiver
  • Wireless USB receiver extender
  • Trap door covering for USB receiver storage bay
  • USB-C to USB-A charging cable
  • Alcohol pad
  • Adhesive L/R side grips
  • Adhesive L/R click grips
  • User documentation

Control
Control
Sensor Specifications
Sensor Technology
Optical (LED)
Sensor Model
PixArt PAW3370
Works On Glass
No
Minimum CPI (DPI)
100 CPI
Maximum CPI (DPI)
38,000 CPI
CPI (DPI) Adjustment Steps
100 CPI
CPI (DPI) Variation
-8%
Minimum Lift Off Distance
1.2 mm
Maximum Polling Rate
1000 Hz

The available polling rate options on the Cooler Master MM731 are 125Hz, 250Hz, 500Hz, and 1000Hz; However, the polling rate is locked to 125Hz in Bluetooth mode. Cooler Master advertises that you can adjust the CPI up to 19000, but you can set the CPI as high as 38000 using the software. The sensor is also very far forward on the mouse, which may take some time to get used to. Unfortunately, while the sensor on our unit is reasonably consistent, it's quite inaccurate and undershoots the set CPI by 17.7% during slower cursor movements and 25.6% during faster movements. Users can alleviate this inaccuracy somewhat by setting their intended CPI between 17%-25% higher than normal.

Note: There are reports online of users experiencing motion latency issues with the Cooler Master MM731. We didn't experience these issues on the unit we tested. We performed our tests at a polling rate of 1000Hz and 1000 CPI.

7.6
Control
Buttons
Buttons Activation
Optical And Mechanical
Total Number Of Buttons
7
Number Of Side Buttons
2
Number Of Programmable Inputs
10
Profile Switching Button
Yes
CPI (DPI) Switching Button
Yes
Gesture Support
No

You can reprogram all of the buttons on the Cooler Master MM731, including the scroll up/down inputs and the unlabeled button on the bottom of the mouse that cycles between CPI settings. You can also add a second layer of programmable commands by enabling the "Mouse Combo" button in the MasterPlus+ software. This "Mouse Combo" function reassigns the middle mouse button as a shift modifier you can hold down to activate the customizable secondary function of other buttons. Unlike other mice with comparable shift functions, the "Mouse Combo" button is automatically bound to the scroll wheel button, and you can't assign it to a button of your choosing. There's an additional switch on the bottom of the Cooler Master MM731 that changes between wireless connection modes and a non-programmable button for wirelessly pairing the mouse.

Control
Mouse Wheel
Scroll Wheel
Notched Wheel
Scroll Wheel Steps
24 Steps
Scroll Wheel Tilt
No
Thumb Wheel
No
Thumb Wheel Steps
No Thumb Wheel
Control
Noise
Click Noise
Quiet
8.7
Control
Click Latency
Click Latency: Receiver
8 ms
Click Latency: Bluetooth
13 ms
Click Latency: Wired
9 ms

Note: Many users online have reported a range of issues with the Cooler Master MM731, including double-clicking, high motion latency, and high click latency. We did not experience these issues at any point on the unit we tested. Furthermore, we tested with the same website many users have been using to verify their double-clicking issues, and we didn't register a single double click with our unit. If you have this mouse and are experiencing issues, feel free to share your experiences in our discussions section.

Operating System And Software
8.0
Operating System And Software
Compatible Software Option
Software Name MasterPlus+
Software Windows Compatibility
Yes
Software macOS Compatibility
No
Account Needed
No
On-Board Memory
Yes
CPI (DPI) Adjustment
Yes
Polling Rate Adjustment
Yes
Profile Configuration
Yes
RGB On/Off
Yes
10
Operating System And Software
Mouse Compatibility
Windows Compatibility Fully
macOS Compatibility Fully

We performed our tests with the Cooler Master MM731 firmware version 2.0.9 and receiver firmware 1.2.8 installed.

Differences Between Sizes And Variants

The Cooler Master MM731 we tested is black, but there's also a white color variant available. Also, there's a wired version of the mouse, the Cooler Master MM730. You can see the label for our unit here.

Compared To Other Mice

The Cooler Master MM731 is an exceptional lightweight gaming mouse with a straightforward look and a pronounced right-handed shape. Unlike other mice in Cooler Master's MM710 series, like the Cooler Master MM710 or Cooler Master MM711, this mouse has a solid plastic shell rather than a body with honeycomb cutouts to reduce weight. Despite this, the MM731 is among the lightest mice in Cooler Master's lineup. It also has Bluetooth functionality, which isn't typical for wireless ultra-lightweight mice, and is a helpful feature for conserving battery when not gaming. Additionally, the left and right-click buttons use optical switches, which Cooler Master claims are more responsive and durable than the mechanical switches found in many similar gaming mice.

For more recommendations, see our picks for the best wireless mouse, the best FPS gaming mouse, and the best lightweight mouse.

Glorious Model D

The Cooler Master MM731 is an exceptional lightweight wireless gaming mouse, while the Glorious Model D is an excellent lightweight wired gaming mouse.  The Cooler Master is lighter and feels sturdier. It also has a much wider CPI range, a lower lift-off distance, and marginally lower click latency. On the other hand, the Glorious has mouse feet that glide more smoothly on mousepads and desks. Both mice are suitable for all grip types, but the Glorious is more accomodating to a wider range of hand sizes overall.

Logitech G PRO X SUPERLIGHT

The Logitech G PRO X SUPERLIGHT and the Cooler Master MM731 are wireless gaming mice with nearly identical weights and similar performance. The Logitech feels much better built and has mouse feet that glide more smoothly. It also has a CPI you can adjust more precisely and a more consistent sensor. Additionally, its software is compatible with Windows and macOS, while the software for the Cooler Master is only compatible with Windows. On the other hand, the Cooler Master has a much more flexible charging cable, a much higher maximum CPI, and two extra programmable buttons. It also has Bluetooth support, which the Logitech lacks.

Cooler Master MM710

The CoolerMaster MM731 is a better ultra-lightweight gaming mouse than the Cooler Master MM710. The MM731 has a right-handed shape and connects either wired with its charging cable or wirelessly via Bluetooth or its USB receiver. It feels somewhat sturdier, has a wider CPI range, and has an additional programmable button. It also has lower click latency. On the other hand, the MM710 is a wired-only model with an ambidextrous shape. It also has mouse feet that glide more smoothly.

Glorious Model D Wireless

The Cooler Master MM731 and the Glorious Model D Wireless are ultra-lightweight wireless gaming mice with comparable performance. The Cooler Master is lighter and has a much wider CPI range. It also supports Bluetooth, a feature the Glorious lacks. On the other hand, the Glorious feels sturdier and has mouse feet that glide better on mousepads and desks. You can also adjust the CPI more precisely. Both mice are suitable for all grip types, but the Glorious is more accomodating to a wider range of hand sizes overall.

Logitech G Pro Wireless

The Cooler Master MM731 and the Logitech G Pro Wireless are ultra-light wireless gaming mice with comparable performance. The Cooler Master is significantly lighter and has better quality mouse feet. It also has a higher maximum CPI, and it has Bluetooth support, which the Logitech lacks. On the other hand, the Logitech feels sturdier and has two side buttons on both the left and right sides. It also has a more consistent sensor, and you can adjust the set CPI more precisely. Its software is compatible with Windows and macOS, while the Cooler Master software is only compatible with Windows.

Cooler Master MM711

The Cooler Master MM731 is a better ultra-lightweight gaming mouse than the Cooler Master MM711. The MM731 has a right-handed shape and connects either wired with its charging cable or wirelessly via Bluetooth or its USB receiver. It's marginally lighter, has a wider CPI range, and has an additional programmable button. It also has lower click latency. On the other hand, the MM711 has an ambidextrous shape and is wired-only. It also has mouse feet that glide more smoothly on mousepads and desks.

ROCCAT Kone Pro Air

The ROCCAT Kone Pro Air and the Cooler Master MM731 are both wireless gaming mice with comparable performance. The Cooler Master is lighter and has a higher maximum CPI. It also has one additional programmable button. On the other hand, the ROCCAT feels much better built and has a thumb rest. It also has a more consistent sensor and a more precisely adjustable CPI.

+ Show more

Discussions