ELECOM DEFT PRO Trackball Mouse, Wired, Wireless, Bluetooth, Finger Control, Ergonomic Design, 8-Button Function, Optical Gaming Sensor, Smooth Red Ball, Windows11, MacOS(M-DPT1MRBK)

I have been using trackballs for decades. My favorite is the Logitech Trackman Marble but it does not have a wheel. I bought a Logitech M570 with a wheel but found that my thumb dexterity is not what it used to be. It took me a long time to find the Elecom Deft with finger operated ball, thumb operated wheel, and lots of programmable buttons. It also took me quite some time to get used to it. But now I am very happy with it.I found two models when researching: M-DPT1MRBK and M-DPT1MRXBK. They are both the same. The one with the X has a multi-language manual and packaging. The one without the X has Japanese language only. But you can download the multi-language manual from Elecom's web page.I use a keyboard tray that slides under my desk. I was concerned that this trackball would be too tall and could not find a height measurement. I can now report that is just slightly over 2.25 inches tall.

I want to start off by saying that this is the only trackball I've ever personally used, so I lack the perspective that a long-time trackball user would have. My search for a trackball began after the realization that the bulk of my wrist pain was due not to my keyboard, but my mouse. I was torn between either the Deft Pro or HUGE, but ended up going with the Deft Pro as many people had stated that the HUGE was best for people with small hands, strangely enough.To get this out of the way immediately, I do recommend giving a trackball a shot if you're having issues with wrist pain. All of my mouse-related wrist pain has disappeared after switching from a Logitech MX Master 2S to the Elecom Deft Pro.First impressions were mixed, to say the least. The adjustment period wasn't too difficult, the hardest change for me being clicking and dragging. After some practice I was able to get the hang of it, so that was no big deal. I quickly began to notice some other issues with the trackball, however. Compared to all of the other buttons on the mouse, the scroll wheel click is fairly stiff to actuate. On top of that, the notches in the scroll wheel's travel don't seem to line up with the actual scroll movement. As a result, I found that I was accidentally scrolling up or down far too often when I was trying to middle click, since the notches were doing nothing to prevent this from happening. In order to mitigate this, I mapped middle click to the programmable button directly left of the ball, which I found works very well. I actually prefer this over trying to click in the scroll wheel, as that was a bit of an unnatural thumb movement for me.That was not the biggest issue for me, however. That would have to be the quality of the synthetic ruby bearings that come pre-installed in the trackball. They're not the worst if you're only moving long distances across the screen, but they cause a lot of static friction when trying to make small adjustments which more often than not led to the cursor skipping right past whatever I was trying to move the mouse over. I ended up buying 2.5mm ceramic bearings from uxcell and swapping them out myself, which significantly reduced the static friction and made the rolling action feel a lot smoother, if a bit louder. Disassembly of the mouse is not too difficult, there's a great guide if you search it up.It should be noted that not everyone will have the same experience in terms of smoothness. Some have reported practically no static friction and extremely smooth rolling with the stock bearings, while others have found that their trackballs were so unusably scratchy that swapping out the bearings can barely save it, with a complete ball swap helping in this case. I've also heard some reports of sharp seams in the ball chamber that cause friction. It appears that Elecom's quality control is a bit lacking.There are a few smaller gripes that I have as well. This trackball doesn't have any onboard memory, so any button remapping is done computer-side. This means that you have to have the software installed on any computer that you connect it to. And for whatever reason my browser back button has a silent microswitch, which doesn't match any of the other switches in the mouse. (it has a gray plunger while all of the other switches have a black plunger) I honestly wouldn't mind if every switch in the mouse was like this, it's pretty nice and silent. Maybe I'll look into purchasing more of those switches and soldering them in at a later date.Problems aside though, this trackball is fantastic. It's not too much larger than a traditional mouse while still being extremely comfortable in my hand, the weight of the ball feels great and it rolls very well with the new bearings, all of the buttons are easily reachable and remappable with the software, the scroll wheel tilts so I didn't lose out on horizontal scrolling from my MX Master, and the pain in my right wrist has disappeared.

after gaming with this i was able to aim better by like 300% !!!!!worth it !!!

Pros:- Medium Size Palm Ergo.- Trackball size is just right.- Clicking thumb feel is one of the best out there.- 8 ButtonsCons- The plastic feels cheap and light. Far from a premium feeling for the price tag.- Tracking ball is lighter than expected.- Profile is moderately high, a mouse palm rest can help diminishing the discomfort.- Trackball bearings are not that great. You can feel and hear them scratch vs a totally smooth experience.- Side scroll feels similar to MS explorer, its ok, but not good for large documents or pages.- Software is not that great. Can be buggy uninstalling on MacOSConclusion. Should be a $35-45 mouse. Premium price is only acceptable for anyone looking for a MS explorer replacement. (Me)

I don't use it for gaming. I bluetooth to my work computer and wireless to my personal laptop. It's great to just flip the switch to go from one computer to the other. The track ball is smooth for me, the wheel is a little less smooth but is fine for my use. The size fits my hand and would work great for someone with larger hands as well. I replaced a wired track ball intellamouse. I was afraid I wouldn't find a good replacement since the track balls didn't take off so well. I was thrilled to find a manufacturer making a great finger control track ball again. Cheers!