Brand | ELECOM |
---|---|
Series | M-XT4DRBK |
Item model number | M-XT4DRBK |
Hardware Platform | Laptop, PC |
Operating System | Windows 8.1, Mac OS X 10.7 Lion, Windows Vista, Windows 7, Windows 10 |
Item Weight | 4.5 ounces |
Product Dimensions | 3.7 x 1.8 x 4.9 inches |
Item Dimensions LxWxH | 3.7 x 1.8 x 4.9 inches |
Color | Left Handed |
Power Source | Battery Powered |
Batteries | 1 AAA batteries required. (included) |
Manufacturer | ELECOM |
ASIN | B016QCPRBM |
Is Discontinued By Manufacturer | No |
Date First Available | October 22, 2015 |
-
-
-
-
-
-
-
2 VIDEOS
-

Image Unavailable
Color:
-
-
-
- To view this video download Flash Player
ELECOM EX-G Left Handed Trackball Mouse, 2.4 GHz USB Wireless, Ergonomic, Thumb Control, Tracking Roller Ball, 6 Programmable Buttons, Tilt Scroll
We don't know when or if this item will be back in stock.
Brand | ELECOM |
Color | Left Handed |
Connectivity Technology | Wireless |
Special Feature | Wireless |
Movement Detection Technology | Optical |
About this item
- ✅《Optical Tracking Technology》The ELECOM "EX-G series" trackball provides precise cursor movement for superior accuracy so you can get where you want on the screen quickly with less hand movement, improving productivity and efficiency. This mouse is designed for a LEFT-HANDED person.
- ✅《Functional 6 Buttons》It is very easy to move in any direction. It comes with 6 physical buttons on the device and the two extra buttons are the scrollwheel tilting that allow horizontal scroll. ELECOM Mouse Assistant software can be easy to customize button functions, it is available to download from ELECOM US website.
- ✅《DPI Cursor》Designed with a high-performance gaming optics system sensor and lens. The DPI button can easily change between 750(LOW) and 1500(HIGH) DPI, making the movements of your cursor faster or slower. Comes with a BLACK BALL that can be replaced with a RED BALL (sold separately).
- ✅《Easy Maintenance 》The ball rolls on three 2.5 mm large artificial ruby ball bearings. They are extremely smooth and the relatively large size prevents dust and dirt from clogging them. So you don’t have to clean the ball bearings too often. The ball is held in place by the ball bearings, but can easily be popped out of the device, by pushing it through the hole in the bottom and it can be easily cleaned.
- ✅《Product Details》System requirements: Windows 8.1, Windows RT8.1, Windows 10, Windows 11 (Horizontal scrolling function is not working in Windows RT8.1), macOS 10.10, Size: W3.7"(94.7mm) X L4.9"(124.4mm) X H1.9"(47.7mm), Weight: 5.3oz(without battery), DPI: 750/1500 count (switchable), Connectivity: 2.4GHz wireless
There is a newer model of this item:
4+ star item to consider
Featured items you may like
From the brand

-
EX-G Trackball Left-Model
Exactly-Grip Ergonomic (EX-G). This series focuses on ergonomic design and reducing the burden on the wrist and arm. For left hand.
-
A large artificial ruby of 2.5 mm in diameter is used for the support sphere. This left-hand, thumb-operated wireless trackball offers advanced pointer tracking performance with solid basic performance and unprecedented new functions.
-
Thumb Model Features
The shape and the placement of each button are similar to those of a mouse, making it easy for people who have used a mouse before to get used to the shape.
-
Thumb Model
-
Index-Finger Model Features
To equip with a larger ball than the thumb type. This has the advantage of making it easier to control the fine movements of the cursor. The feel of the operation is unique and requires some getting used to.
-
Index-Finger Model
-
Handy Model & Accessories
-
Japan Design
High design quality has been recognized by numerous design awards, including the Good Design Award, as well as by many users.
-
ELECOM is a Japanese consumer goods company with a simple mission: create quality products that deliver the most comfort and convenience for its customers. With a track record boasting some of the most innovative yet accessible products ever created, ELECOM has consistently raised the standards of excellence for technology products while taking care of its customers and employees.
Product Description



![]()
EX-G PRO
|
![]()
EX-G
|
![]()
EX-G Left Hand
|
![]()
Relacon
|
![]()
bitra
|
![]()
Replacement ball
|
|
---|---|---|---|---|---|---|
Add to Cart
|
Add to Cart
|
Add to Cart
|
Add to Cart
|
|||
Customer Reviews |
3.9 out of 5 stars 1,709
|
4.1 out of 5 stars 1,810
|
4.3 out of 5 stars 1,199
|
3.8 out of 5 stars 3,597
|
3.7 out of 5 stars 1,043
|
4.4 out of 5 stars 1,173
|
Price | $59.99$59.99 | — no data | $29.57$29.57 | $64.99$64.99 | — no data | $17.99$17.99 |
Style | Thumb | Thumb | Thumb | Handheld | Thumb | - no data |
Hand Orientation | Right | Right | Left | Ambidextrous | Right | - no data |
Connection | USB 2.4GHz + Wired + Bluetooth | USB 2.4GHz / Wired | USB 2.4GHz | Bluetooth / USB 2.4GHz | Bluetooth / USB 2.4GHz | - no data |
Buttons | 8 | 6 | 6 | 10 | 5 | - no data |
DPI switch | 500/1000/1500 | 750/1500 | 750/1500 | 500/1000/1500 | 750/1500 | - no data |
Ball Size | 34mm | 34mm | 34mm | 25mm | 25mm | 34mm |
![]()
DEFT PRO
|
![]()
HUGE
|
![]()
DEFT
|
![]()
bitra
|
![]()
Tilt-adjustable Pad
|
![]()
FITTIO wrist rest
|
|
---|---|---|---|---|---|---|
Add to Cart
|
Add to Cart
|
Add to Cart
|
Add to Cart
|
|||
Customer Reviews |
4.0 out of 5 stars 1,959
|
4.2 out of 5 stars 2,980
|
4.1 out of 5 stars 2,857
|
3.9 out of 5 stars 1,015
|
3.7 out of 5 stars 211
|
4.4 out of 5 stars 627
|
Price | $59.99$59.99 | $49.99$49.99 | — no data | — no data | $21.99$21.99 | $33.25$33.25 |
Style | Index Finger | Index Finger | Index Finger | Index Finger | - no data | - no data |
Hand Orientation | Right | Right | Right | Right | - no data | - no data |
Connection | USB 2.4GHz + Wired + Bluetooth | USB 2.4GHz / Wired | USB 2.4GHz / Wired | Bluetooth / USB 2.4GHz | - no data | - no data |
Buttons | 8 | 8 | 8 | 5 | - no data | - no data |
DPI switch | 500/1000/1500 | 500/1000/1500 | 750/1500 | 750/1500 | - no data | - no data |
Ball Size | 44mm | 52mm | 34mm | 34mm | - no data | - no data |
Mouse Assistant
STEP1
1. Go to the "ELECOMUSA " website. (Not ELECOMUS website)Click "Mouse Assistant" in the middle of the top.
2. Select "WINDOWS" or "MAC" for installation. (When installing on a PC running security software, it is recommended to temporarily deactivate it before installation.)
3. Click "MOUSE ASSISTANT MANUAL" if you want detail about it.
STEP2
1. Save to your computer. (If you have any problem or question, please contact ELECOM on this website.)
2. Installation is now complete. If successfully installed, the Mouse Assistant icon is visible in the indicator as shown in the image. Let's open it!!
STEP3
1. Select your language. Click "OK". Then the window is closed automatically. Please open it again.(Setup required each time it is opened)
2&3. Button Function Assignments
4. Scroll speed adjustment
5. Arrow: Manual & Help

Compare with similar items
This Item ![]() ELECOM EX-G Left Handed Trackball Mouse, 2.4 GHz USB Wireless, Ergonomic, Thumb Control, Tracking Roller Ball, 6 Programmable Buttons, Tilt Scroll | Recommendations | |||||
Try again! Added to Cart spCSRF_Treatment Add to cart | Try again! Added to Cart spCSRF_Treatment Add to cart | Try again! Added to Cart spCSRF_Treatment Add to cart | Try again! Added to Cart spCSRF_Treatment Add to cart | Try again! Added to Cart spCSRF_Treatment Add to cart | ||
Price | Currently unavailable. | $49.99$49.99 | $20.99$20.99 | $15.99$15.99 | -16% $41.99$41.99 List: $49.99 | -15% $68.07$68.07 List: $79.99 |
Delivery | — | Get it as soon as Saturday, May 17 | Get it as soon as Monday, Jun 2 | Get it as soon as Saturday, May 17 | Get it as soon as Sunday, May 18 | Get it as soon as Saturday, May 17 |
Customer Ratings | ||||||
Sold By | — | Amazon.com | SANWA | Fresh Style | Slam-Dunk | Amazon.com |
connectivity tech | Wireless | Bluetooth | USB | Wi-Fi | Bluetooth | Bluetooth |
hand orientation | Left | Right | Left | Left | Ambidextrous | Left |
power source | Battery Powered | Battery Powered | Battery Powered | Battery Powered | Batteries | Batteries |
tracking method | Optical | Optical | Optical | Laser | Trackball | Optical |
range | 5 meters | 30 feet | — | 10 | 33 feet | 30 feet |
button quantity | 6 | 2 | 5 | 6 | 3 | 6 |
hardware platform | PC, Laptop | PC | — | — | Personal Computer, PC | PC, Mac |
battery quantity | 1 aaa, 1 aa, 1 aaaa | 2 aa | — | 2 aaa | 1 aa, 1 lithium ion, 1 9v | 2 lithium polymer, 1 aa |
batteries required | ✓ | ✓ | ✗ | ✓ | ✓ | ✓ |
weight | 0.28 pounds | 5.6 ounces | — | 100 grams | 232.5 grams | 0.45 pounds |
battery average life | — | — | — | 100 hours | 24.0 months, 20.0 months | 24 months |
Videos
Videos for this product
0:30
Click to play video
ELECOM EX-G Left-Handed Trackball Mouse- Wireless, Thumb Control, 6-Button FunctionELECOM Japan Direct US
What's in the box
Product information
Technical Details
Additional Information
Customer Reviews |
4.1 out of 5 stars |
---|---|
Best Sellers Rank | #73 in Computer Trackballs |
Warranty & Support
Feedback

ELECOM EX-G Left Handed Trackball Mouse, 2.4 GHz USB Wireless, Ergonomic, Thumb Control, Tracking Roller Ball, 6 Programmable Buttons, Tilt Scroll
Share:
Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.
Where did you see a lower price?
Fields with an asterisk * are required
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find this trackball mouse excellent for left-handed use, with comfortable hand fit and good ergonomic design. The functionality and build quality receive mixed feedback - while some say it works great and holds up well with extensive use, others report it barely works and is poorly made. The buttons and language instructions also get mixed reviews, with some finding them easy to use while others report them being finicky and the manual being in Japanese only. The stickiness is a significant issue, with customers noting that the ball motion is sticky and the cursor movement is choppy.
AI-generated from the text of customer reviews
Customers love this trackball mouse, particularly for left-handed use.
"...This made an immediate big diffference. It turns out the trackball isn't jerky, the little stickiness in small movements made my motions jerky..." Read more
"...All in all it all works well, the ball is nice especially when your desk space is limited and for a change of moving your hand with a traditional..." Read more
"...The roller ball is fantastic! My job requires to me use my mouse nearly all day and I'm pleased with how much faster I can work with this mouse...." Read more
"...The track ball seems to suck up and accumulate dust and detritus into its socket cavity better than the best vacuum cleaner...." Read more
Customers find the mouse comfortable to use, particularly noting that it fits their hand well and has nice ergonomics.
"...Action is smooth and reliable, its a comfortable, versatile tool, the ball moves smoothly, and is easily popped out for cleaning if you poke it out..." Read more
"...The ergonomics have been pretty good for me so far, and I like that its rather weighty so it stays in place as I use it...." Read more
"Feels and works great" Read more
"Responsive, feels nice, wish it were more vertical." Read more
Customers appreciate the trackball mouse's design for left-handed users, with one customer noting it works well as a sidekick for right-handed tablet users.
"...I'm happy to have finally found the perfect trackball for left-handed gamers, or any other southpaw who needs the precision and ergonomics of a..." Read more
"I love the fact that it is a left handed mouse and fits so well in my hand. It has been super difficult finding left handed mice...." Read more
"Good: It's the only left handed thumb trackball I can find, so if you want that, this is the trackball for you, by default...." Read more
"...This also means you can keep a right hand mouse or track ball and it's buttons will remain correctly mapped...." Read more
Customers have mixed experiences with the mouse's functionality, with some finding it works great and operates smoothly, while others report that it barely works or is virtually unusable.
"...assignable to the buttons, it's clear that this mouse is meant to be versatile not only as a gaming mouse but mostly as an office worker mouse...." Read more
"...Action is smooth and reliable, its a comfortable, versatile tool, the ball moves smoothly, and is easily popped out for cleaning if you poke it out..." Read more
"...being 'jerky' or ''jumpy', making it difficult and frustrating to use for fine work. I found two solutions:..." Read more
"...It looks nice, runs well, and I'm a satisfied customer." Read more
Customers have mixed opinions about the mouse buttons, with some finding them helpful and easy to use, while others report that they are finicky and the main button sticks.
"...It has also two additional buttons for the index finger (similar to those of my Logitech), and -the quirkiest- the wheel not only works as an up and..." Read more
"...Stickiness...." Read more
"...Lots of buttons, and a wheel that also tilts left and right, and pushes straight down too...." Read more
"...The button switches are decent - nothing like you find on a quality right handed mouse, but I’ve basically given up hope of finding excellent..." Read more
Customers find the trackball mouse easy to use and plug-and-play, but report that the instruction manual is only available in Japanese.
"...The instructions are completely in Japanese, but the unit is plug-and-play. Who needs instructions? - Can't speak to battery life yet...." Read more
"...the needed battery (another nice touch) and a brief quick start guide in japanese, but with enough annotations in English to succesfully start..." Read more
"...It does take a bit of getting used to, but I seem to have adapted fairly quickly...." Read more
"...n't use the horizontal scrolling very often but it's responsive and easy to use...." Read more
Customers have mixed opinions about the trackball mouse's build quality, with some praising its high-quality Japanese construction and noting it holds up well with extensive use, while others find it poorly made with cheap components.
"...I'm glad that I did. First thing, it's a light but sturdy sculpted object, it fits perfectly into my left hand, with generous rubber pads..." Read more
"...Unfortunately, it’s cheap, jumpy, and clunky...." Read more
"...Manufacturing quality appears fairly good, but hey, I really haven't had it long enough for many possible QA/QC issues to show up...." Read more
"...More expensive - you can find M570s on sale for about half what I paid for this...." Read more
Customers report issues with the mouse's trackball, noting that the ball motion is sticky, doesn't roll smoothly, and tends to get stuck.
"...Stickiness. The ball doesn't move totally freely, but has a 'stiickiness' which shows up when you're trying to do very precise movements, like..." Read more
"...Initially, the ball movement was jerky. It was very difficult to adjust just one pixel on my screen...." Read more
"...trackball which is further exacerbated by some stickiness/looseness issues with the ball housing...." Read more
"...One choice only......the Elecom. Everyone said the same thing-the ball sticks, jerks and the thing is basically unusable...." Read more
Reviews with images

Terrible product until you file down the "sticking spot", Then GREAT!!!
Top reviews from the United States
There was a problem filtering reviews. Please reload the page.
- Reviewed in the United States on December 14, 2021I've been using Trackball mouses for more than 20 years, but on these last months I can't endure long sessions of PC usage or gaming anymore. Mi right hand and wrist end up stiff and hurting. That's why, even though I'm right handed, I decided to learn to use a Left handed trackball, so that I can alternate between both hands.
I didn't look too much into the perks and features of this model. It just seemed nice and affordable (even with the addition of shipping costs to Spain). But boy was I in for some pleasant surprises.
I was still using the old version of the Logitech M570 (standard left and right buttons, wheel + wheel button configuration plus 2 additional customizable buttons). Now, I don't know about the recent M570 v2, but this ELECOM, compared to the old M570 wins by a landslide, let me tell you...
First of all, when you rest your hand on the mouse you get a feeling as if the shape of the hand was kind of sculpted into the mouse, as if you had slightly pressed your fingers on some clay and then it had dried.
In addition to the usual left and right buttons (which you normally would press with your index and middle finger), there's one extra for your ring finger.
It has also two additional buttons for the index finger (similar to those of my Logitech), and -the quirkiest- the wheel not only works as an up and down scroll and button, but has also a right and left tilting movement which function as TWO MORE buttons. The neat part is you can assign any key or keyboard functions (and even most combinations of keys except Ctrl+Alt+Del for safety reasons, or so it says) to each of the buttons.
The configuration software is NOT provided on the eco-friendly sober packaging (nice touch). You just get the mouse, the small USB receiver (which you can attach to the back of the mouse for storage or transportation), the needed battery (another nice touch) and a brief quick start guide in japanese, but with enough annotations in English to succesfully start using the thing.
Speakinf of the customizable buttons, I find REALLY useful to have CTRL+C and CTRL+V (Copy and Paste) on the left and right wheel tilt buttons. Also the SPACEBAR and ESC on the index extra buttons and right now I have "maximize window" on my ring finger one, which suits my current needs for one of my most used programs.
By the range of functions assignable to the buttons, it's clear that this mouse is meant to be versatile not only as a gaming mouse but mostly as an office worker mouse. It must be great for Excel users, and maybe photo or video editors too. Also for enviroments using more than one screen.
It has another function called "flying scrolling", in which you can use your mouse wheel not for manually scrolling but to start and stop scrolling. Not useful for me at the moment, but I understand it can save a lot of manual flicking in many scenarios.
Since I'm not a hardcore gamer (mostly point and click adventures and puzzl-like games) I cannot say for sure how this mouse behaves as a gaming device, but I reckon that must be good. It has a DPI selector, which is also new for me, so that you can choose between covering about 60% of the screen (horizontally) with one movement of the thumb rolling the ball, or covering the whole screen in less than the full range of the ball. I'm sure that must be handy when trying to shoot zombies or whatever kids are doing nowadays
On the bad side (but not really): Call me old schooler, but I miss the days of having a phisical copy of the drivers and software included with the periferials. That's the only "con", if any, that I've found on this mouse so far.
But all in all I find it a great product, I am very satisfied with the purchase and I think I'll end up buying the right handed version also. I'm finding that controlling this mouse with my left hand is a lot easier than I anticipated. But I wonder if I'll be able to edit video with 2 mouses at once with SO MANY ASSIGNED BUTTONS (lol). Maybe I'm on to something here, who knows...
You don't have any way to confirm this, but I assure you that ELECOM has not paid me anything for this review, I kid you know. I REPEAT: ELECOM didn't sponsor this review, nor did they promise me to send me the right handed one... yet. (But surely wouldn't hurt, either, wink, wink).
- Reviewed in the United States on April 3, 2019First up, I've spend most of my career at a keyboard of one sort or another, this has given me a deep appreciation for ergonomic designs to prevent RSI or carpel tunnel problems.
Second, I'm left-handed, I switched from left-side mouse to left side trackballs a long time ago, relying mostly on Logitech's ambidextrous models.
Third, I'm a gamer, and was never really happy with the Logitech's lack of a mousewheel and limited number of buttons.
I tried a lot of other trackballs, all ambidextrous, all flawed or awkward to use.
I finally decided to overcome my dislike for things that consume batteries, and try this ELECOM M-XT4DRBK.
I'm glad that I did.
First thing, it's a light but sturdy sculpted object, it fits perfectly into my left hand, with generous rubber pads on the bottom to keep it from shifting no matter how fast the zombie hordes spawn around me. It came well packed with a AA battery, and it's little USB receiver hiding in a storage well on the underside of the trackball (this feature makes it a winner for keeping the dongle save and together with the trackball until it's time to use it.)
It starts off as a 'generic' sort of mouse until you download the setup software, which also lets you set up custom button profiles for different programs. Lots of buttons, and a wheel that also tilts left and right, and pushes straight down too.
Battery life is pretty good, I've been using it for 2 weeks now on low power setting,
Action is smooth and reliable, its a comfortable, versatile tool, the ball moves smoothly, and is easily popped out for cleaning if you poke it out with a pencil or something, it won't fall out accidentally, also a good thing when traveling.
I'm happy to have finally found the perfect trackball for left-handed gamers, or any other southpaw who needs the precision and ergonomics of a trackball without losing features like extra buttons and a mousewheel.
It is rare for someone to make this level of product for us lefties, so I strongly encourage you to give it a try!
Top reviews from other countries
-
LaloReviewed in Mexico on December 17, 2024
5.0 out of 5 stars Excelente relación de calidad y precio
Excelente relación de calidad y precio, funciona perfectamente
- Nikit RajputReviewed in India on May 5, 2025
2.0 out of 5 stars Sidewise scrolling is not good.
Sidewise scrolling is not good. Which is main function we are buying this mouse for.
-
Luís Alberto Marconato MatiasReviewed in Brazil on August 30, 2024
5.0 out of 5 stars Mouse ótimo!
Muito bom para quem procura um mouse para canhoto!!!
- Liang JiaReviewed in Singapore on September 7, 2020
5.0 out of 5 stars easy to use
Fast delivery to Singapore from USA. It took only 1 week at this covid-19 period. The mouse is easy to use yet the trackball is not as smooth as how i feel with a logitech one. However, you won't get a left-handed mouse from logitech.
-
suofeiReviewed in France on February 10, 2024
5.0 out of 5 stars Enfin une souris complète et agréable pour gaucher !
Ma fille est gauchère avec une fine et petite main et au début trouver une souris agréable fut difficile alors je lui ai donné ma vieille trackball qui avait une boule au centre et qui lui correspondait parfaitement, bien que simple. Sauf que ses logiciels demandaient de plus en plus de précisions et elle avait besoin d’une molette et plus de programmation possible avec plus de boutons. Ayant moi même un modèle depuis quelques années de cette marque que j’aime bcq (mais avec boule au centre), je n’ai pas hésité et elle adore travailler avec ! Ma seule critique, propre à cette marque, est qu’il faille passer par un dongle pour utiliser la souris, ce qui occupe un port sur des pc portables qui en contiennent de moins en moins (J’ai dû finalement changer personnellement de souris uniquement pour cette raison). C’est une excellente marque avec des matériaux de qualité et durables.