I tried my first trackball mouse a long time ago and then went years without using one because the price on them went nuts and you couldn't find them either. Its nice to see there are options that don't cost a fortune and work well. This one does the job and is comfortable to use. It runs on replaceable batteries which is fine. I prefer rechargeable devices but its not a big deal. I still keep small cases of AA and AAA batteries around for devices that are not rechargeable. The mouse runs for a long time on batteries so its not a big deal. It connects to your device with a dongle that is included. Everything worked on first startup right out of the box. It works great and is comfortable to use. A nice trackball mouse.

Been using trackballs for some time now. This one offers a wider palm cap which reduces fatigue and muscle strains, which I like. It does feel as if your hand is in a more natural stance while using it. Pointer accuracy is pretty good with the ball but at times, the on screen pointer would struggle to keep up with the trackball action. The scroll wheel seems to skip and jump lines when in use as well. Not all the time, but randomly.

I do a bit of product development and electronic circuit design and in that effort I do 3d printing of parts and enclosures and also manufacture my own circuit boards. So I use a lot of CAD (Computer Aided Design) and like to use a trackball mainly because it frees up more desk space by not having a mouse pad. I already had a wireless trackball but it used an internal chargeable battery which was way undersized and would require charging every other week or so at the most inconvenient times. Like the "Mice" that I use at our other computers, I really like the fact that this trackball uses AAA batteries which I suspect will last a long time just like they do before requiring a battery change.I downloaded the driver app that offers several features not included in the standard windows driver, but that's not necessary because the trackball worked fine with the standard plug+play windows driver too.The buttons all feel good and do what they are supposed to and of course the functionality of each can be changed in the driver to suit your taste. I like that the rocker button toward the palm of your hand from the scroll wheel selects between hi and low dpi of the trackball but wished it was just a single button that would flip between hi and low rather than a rocker switch. But that's just my personal preference because I do a lot of that resolution switching while using CAD.The unit itself feels very good in the hand because it has a nice almost felt like feel. It's a little larger than my other trackball which I like because it fits my hand better. I like this trackball, and if you're partial to a trackball i think there's a good chance you'll like it too.all my best,dr

The body of this trackball is considerably smaller than any I've ever had. The old wired Logitech TrackMan Marble is still the gold standard for comfort and size IMO. This has a similar shape but quite a bit shorter from fingers to palm. My first thought was that there was no way this would work for my larger than average hands (size L-XL in most gloves) but it's actually fine. It has a nice textured almost rubbery finish that's typical.It comes with a USB adapter for wireless and is NOT bluetooth - it's proprietary. It will not connect to any built-in bluetooth adapter your computer may have. Too bad. The little USB adapter works just fine of course but it does use a USB port. No driver software was needed but Perixx does offer a driver for Windows on it's website. I think it's only necessary for some customizations. The standard Windows mouse driver works perfectly.I use the 1200 dpi (fast) setting for normal use. You just press the button below the scroll wheel to change this setting. The 400 dpi (slow) setting is useless IMO. I suppose it's for software that requires crazy fine movement (which is just bad software IMO). I have all the precision and speed I need for normal computer use and even CAD software at 1200 dpi.The buttons have the perfect spring tension. Other trackballs I've tried are too light and way too easy to click accidentally. The buttons are right next to each other like all trackballs these days. I'd much rather use my pointer and third finger for the buttons and middle finger for the wheel but the buttons need to be wider and/or further apart for this. The scroll wheel is indexed and is also a button. I wish it were a little further forward. I never use the extra buttons on the left and don't even know what they're for. Maybe you need the Perixx driver to set those up.The ball rolls smoothly but does have a small amount of stiction compared to larger balls I've had on other trackballs. It's not a problem for general use but the stickiness is noticeable in CAD software. I guess bigger balls are better for some things. The "red" ball is more like a grapefruit color than red. Kind of ugly IMO.Hopefully the rechargeable AAA batteries I'm using last 6 months between charges. That would be about twice as long as built-in batteries go IME, without the concern of a dead built-in battery making the whole trackball disposable.Overall, it works well and the price is good. I wish it were bluetooth and a little larger. 2 sizes plus a left-handed version makes sense to me! It's probably sized perfectly for most normal sized hands. I firmly believe more people would use trackballs if they gave them an honest try. Pushing a mouse all over your desk is just silly. A trackball takes up far less space and gives so much better control without causing any shoulder discomfort.