ELECOM EX-G Left Handed Trackball Mouse, 2.4 GHz USB Wireless, Ergonomic, Thumb Control, Tracking Roller Ball, 6 Programmable Buttons, Tilt Scroll

Good trackball mouse, like the 3rd button and the software allowing custom setup, really helps with my engineering work. The buttons are a little on the louder side when clicking compared to other devices. Good value, comfortable to use and surprisingly quick to adjust to using it

The packaging is superb. No fancy printed, oversized glossy boxes. A simple protective box. There is no 200 page multi-lingustic manual. Only the need to use the website to download the manual and software. The materials could be a little better. It feels flimsy. The ball isn't quite as smooth as I would like. This is my first tracker. There are minute areas that feel hesitant. This could just be my inexperience. The downloadable software, manual and controllers, is easily found. As is the configuration of profiles and the assignment of buttons. I will update this review further after a few months usage.

Brilliant mouse. Nice adjustable sensitivity. Works great. Feels sturdy.

This is a great product! Works very well on Chrome 134. Only the very left hand button doesn't do anything.

I bought this because I've developed a problem with my elbow & thought this might help. It's taken a bit of getting used to but has definitely helped my elbow.

I already use a Logitech M570 but found after years of use my thumb was getting sore if I used it a lot in the evening. I'd have got a left-handed M570 if they did one but this trackball was the only option I could see. If you're happy using a thumb trackball then this is great. Nice smooth action and the only slight complaint I have about it is that my middle finger (resting on the right-click button) sometimes fires it accidentally if I tilt my hand forward at all as the pressure to click it is light. Otherwise it's all straight forward. The function button (ring finger) has to be setup with the Elecom utility. Yes, the instructions packaged with it are in Japanese, but there's a QR code and web address supplied to get the multilingual manual (which you'll need for all of about 2 minutes). Ideal if you already like using a right-thumbed trackball and want something to switch around with. Update: After 3 days of use I have to say that the sensitivity of the buttons is infuriating. Just the weight of my middle finger causes me to unintentionally right click all the time. The third (function) button is also very sensitive. Such as shame, it's fine in every other way but I'm going to have to return it because of this functional issue.

I'm more or less ambidextrous. I have carpel tunnel syndrome in my favoured, my right, hand. I use a trackball, a Perixx, for my right hand but have been trying, and failing, to use it in my left for a while. The Elecom XT40R is one of the very few trackballs, with a wheel, suitable for left-handed use. I so wanted to like it. The instructions are in Japanese. The diagrams are poor and, in any case, do not cover the programmable keys. The website is also in Japanese and Google translate doesn’t help when trying to find the particular device. The name on the trackball, Ex-G does not produce any search result and one has to use the number on the bottom of the device, together with a magnifying glass to read it. I eventually found the pdf, and the brief English bit tells one to go to a URL on the Japanese site. So I put the Bluetooth USB device in, put the supplied battery in the trackball. No response. After a few minutes, I put in a new AA battery. Success. Then it's a case of downloading the driver and restarting. The device is comfortable to use, although I have large hands and the device is a bit small – the norm for me. Otherwise it’s promising, although it feels about as robust for the price as I’d expect. Default is right-click for left-click, if you see what I mean, which is a bit odd. On the good side: lots of programmable keys, three main buttons, a wheel that you can use to scroll horizontally and, superior to my Perixx, a smooth ball action. Kudos to Elecom for providing a left-handed device. I said I'd update my review after more use. I've got used to it, find it comfortable, which was the main thing I was looking for, but the ball is not as smooth as I'd hoped, and inferior to my Perixx. Allround, I'm reasonably satsified, and the price was keen.

Very much like using this trackball. I used to use a track ball many hundreds of years ago. I got it due to space limitations and gaming. So I tend to usit quite a bit in war thunder for controlling the tanks and ships. It did not take long, just a few seconds to setup and i would say 45 minutes to get uset to. I using this with my work laptop now as the space is quite limited for mouse movement. All in all I am impressed. THough its a bit annoying to pay more just because I am left handed, but then again, it will annoy my right handed friends as they will have to adjust or use a different mouse!