Nulea Wireless Ergonomic Trackball Mouse, Rechargeable, Bluetooth Rollerball Mouse, 44mm Index Finger Trackball, 5 Adjustable DPI, Compatible with PC, Laptop, Mac

I'm accustomed to using a mouse with a scroll ball/button, forward/back buttons, and left and right click buttons. I transitioned with ease to this mouse, and LOVE it. I bought it for my work computer, but am considering buying it for my home computer as well.The trackball mouse is very comfortable to use and seems to be helping with my tennis elbow problems. I've been using it for 3 weeks , and overall I'm extremely pleased with the transition.First, I had to set the trackball sensitivity. It was just awful until I found the setting that worked best for me (just a few tries with an easy to use interface).Then, I had to figure out how to use the trackball. This sounds odd, but I wasn't sure if I should use my index finger, middle finger, or both. Ultimately, I use a combination of my index and middle finger on the trackball, and use my ring finger for the right click button. This was an intuitive/thoughtless transition.Thumb buttons and accessibility: Using my thumb for a left click was also a very easy/thoughtless transition. I was less confident about the placement of the forward/back button, as they're above the scroll wheel, but I've found this isn't an issue at all.The hardest adjustment has been the scroll wheel. There's just not as much movement capability with my thumb as there is with my middle finger (which is what I used to control the scroll wheel on a traditional mouse). I can do it, and I've adjusted, but it's slightly more effort than a traditional mouse. As an alternative, I can press the scroll wheel button, which then allows me to control scrolling with the trackball.After 3 weeks of office usage, I'm thrilled. With the exception of very few tasks (relating to precision work, like drawing in paint which I do very little of) I'm 100% converted and competent with the trackball. I expect that as I continue to use the trackball, my comfort in using the trackball for precision work will increase.To conserve the battery, the mouse goes to "sleep" after some period of time, but it wakes up quickly with the click of the mouse. I've yet to charge it, you do need a USB-C cable to charge it.I can't comment on it's suitability for gaming, as I use it at work, not home. Given my challenges with precision use of the trackball (like for drawing in paint), that would definitely be a more difficult transition for me were I to try it with any of my first person shooter games. To be very clear - I can move the trackball around just fine in word and for selecting links, etc. It's literally just things like trying to free draw a straight line in paint or something similar that I'm not as good at, yet.If you're considering a trackball mouse (and you're not left handed), this is a GREAT choice. The functionality is excellent and it's very comfortable to use. I appreciate the color choices available, and the price at $32 was reasonable.

This trackball mouse has been a great addition to my setup. It works flawlessly across my Apple devices, Xbox, and PC. The ergonomic design is incredibly comfortable, especially for long hours of use, and since it’s a trackball, there’s no need to move the mouse around—just smooth, precise control with the ball.What I really appreciate is the flexibility in connectivity:- Bluetooth pairs instantly with my MacBook.- Wireless USB dongle works perfectly with my PC and Xbox.- The USB-C connection not only charges the mouse but also allows for a wired option when needed.The mouse feels lightweight and sturdy, and the trackball itself is responsive and smooth. I’ve experienced no lag, whether I’m scrolling through documents or navigating games on Xbox.Another great feature is the ability to adjust the mouse sensitivity. You can tweak the settings through the operating system, but there’s also a push button at the bottom of the mouse for quick sensitivity adjustments, which is really handy for on-the-fly changes.Battery life has been excellent. It charges quickly via USB-C, and I can go days without needing to recharge. The convenience of not having to move the mouse around has really reduced strain on my wrist.Overall, this is a great trackball mouse. It’s ergonomic, versatile, and packed with useful features, making it perfect for multi-platform use. Highly recommended.

The Nulea M505 clearly took "inspiration" from the Sanwa Gravi finger ball -- word on the street is they are made in the same factory to similar specs -- yet there is enough small changes to make them different. And I think that's exactly the point, to make them different.Tl;dr: ergonomic contour mostly the same (which is good), physical buttons arranged differently and with different characteristics (slightly worse than the Gravi for my own use but may be preferable for other people)In terms of overall shape and contour, the Nulea M505 and the Sanwa Gravi are almost identical -- the only, superficial, difference being the front on the Nulea is more rounded. You'll never feel (or even see) that while using it. This similarity is a good thing, because IMO Sanwa Gravi is the first trackball in the last decade to actually nail the ergonomics of palm contour (more details on my longer review on the Sanwa Gravi page).The physical buttons on the M505 _are_ arranged differently and have different characteristics. It used the more traditional arrangement where on the thumb cluster you get left button, wheel, forward, and backward. The right button is moved to the right of the ball under the ring/pinky finger. On the Gravi, you would have the right button taking the place of the forward _and_ the backward buttons, and have forward and backward as two big(ger) buttons under ring and pinky. I slightly prefer the arrangement on the M505 because it's more in line with other finger balls and is therefore more intuitive.A big difference in terms of implementation, however, is that the left button on the M505 is slightly recessed from the casing. For people with longer thumb (like myself), this may be a problem because you'll have to curl up your thumb a bit to engage the left click -- or rotate the trackball body clockwise so your thumb lands closer to the rear end. In my opinion, neither solution is ideal because this is unnecessary restriction on ergonomics. As a comparison, the left button on the Gravi is slightly _raised_ from the casing, making it more comfortable to engage with any part of your thumb (even the joint, if you like). This may be the most serious issue people should consider when choosing between the two.Another difference, not as big but still could be significant, is that on the M505, the upper edge of the left button sits lower than on the Gravi. This is because on the M505, the wheel is implemented as blocking off a whole stripe of real estate on the thumb cluster (the left button does not share any edge with the back/forward combo). On the Gravi, the left and the right buttons (the right taking the place of the back/forward on the M505) share a horizontal edge, and the wheel is implemented as a thin cutout on their shared edge. What this means in practice, is that on the Gravi, you can engage the left button on a vertically higher position (near the edge it shares with the right button), which is closer to your palm, and so requires less of a clawing gesture for left click than on the M505. I'm not sure whether or not this may lead to more stress on the thumb long term.A side effect of having the back/forward on the M505 on the thumb is that the back button is more difficult to reach. Clearly not enough thought was given when the decision was made to simply split the right button on the Gravi into two equal halves of back and forward on the M505. In my opinion both buttons should be moved more toward the front.Yet another difference: on the M505, middle click can be activated by tilting the wheel downward. On the Gravi, it is activated by flipping the wheel upward. I don't have a preference one way or another but would note that both are more ergonomic than on a typical wheel where you'll need to press inward and could accidentally trigger a scroll event.The ball movement is appreciably smoother than the Gravi out of the box. Combining with the fact that it's also easier to remove the ball from the M505, I would guess they reduced the height of the bearings slightly.The placement and labeling of the dpi/connectivity switches on the bottom is significantly better on the M505 than on the Gravi (The latter has the most illogical arrangement I've ever seen, and with no labeling whatsoever on 2 out of the 3 switches)All things considered, I think the M505 is a very decent finger ball. My main beef with it is the recessed left button, which to me is a not-insignificant ergonomic regression, and to a lesser degree the wasted real estate around the wheel, which could have been used for a more ergonomic left button. But these may not be much of an issue without comparison to the Gravi. The price point of the M505 -- being close to half of that of the Gravi -- is certainly much more reasonable.