KensingtonOrbit Wireless Trackball with Scroll Ring - Black-Red (K70990WW),

I bought this for use as a media PC controller while I sit on my couch. It works very well in that capacity, much better than a mouse. The trackball has good accuracy and the scroll wheel is one of those things that's great once you get used to it. Very happy with this purchase.

If you have a small work area this is great! No more chasing a mouse or having your hand run all over the counter top. Best thing i have bought!

I bought this trackball at the end of April, '22, so am coming up on 5 months of use and feel I can now give it a proper review. I had limited space to manipulate a mouse which required me to move the cursor a bit, pick up and return the mouse to the starting point, and incrementally moving it again until I got the cursor where I wanted it. A real pain. The trackball has solved that problem completely.My keyboard and the trackball are on a forward tilting platform. Even so, the design of the trackball resulted ergonomically in my hand being cocked upward forming a V with my arm and bending my wrist at an unnatural angle. So I had to buy a wrist support pad to elevate my wrist and align my hand and arm properly. I can now use the trackball with much less discomfort than I experienced with the mouse, but prolonged use still causes me to have some pain across the back of my hand.I found this trackball easy to use and adapted to it within just a couple of days, now being able to trackball like a pro. I use my second and middle fingers to manipulate the ball, my ring finger to rotate the scrolling ring, and my little finger and thumb respectively to hit the left and right function buttons (I am a southpaw). Using my little finger took a bit of getting used to but now I am quite adept with it. I really like that the scrolling ring used with the CTRL key changes from a scrolling to a zoom function. The software is very versatile and allows me to configure the scrolling speed with an inertia mode function. Using inertia mode is handy because I can scroll slowly in a controlled fashion and then just spin the scrolling ring if I want to rapidly skip to something further up or down. Similarly, the pointer speed and acceleration can be set. However, I have both set to fairly slow because otherwise the pointer speed becomes blinding and is almost uncontrollable. The software also permits configuring the function buttons and reversing the action of the scrolling ring. The composite settings can be saved to and restored from a file. The settings make this a great trackball for use with either hand.I have only had to remove the ball and clean it and the socket a couple of times, when the operation started to become jittery or skip. It is as simple as pushing the ball out of the socket from the rear, then wiping away any dust or debris from both with a soft cloth, and clicking the ball back into the socket.One quirk that is annoying is that at times, the left button is not responsive. It will work fine for weeks and then start working intermittently, then start working normally again. This doesn't happen often but when it does, it is frustrating. The second complaint is that the trackball is just not as precise as a mouse for cursor placement (such as while editing a document). So I keep the mouse handy and still occasionally use it for this purpose. Interestingly enough, the trackball and the mouse work simultaneously and seamlessly and I have gotten quite good at two-handed operation. I understand that reduced precision is a characteristic of trackballs in general so this is only a small negative to me. The DPI switch on the bottom of the trackball housing is a push button, and the DPI is set by repeatedly pushing the button. Unfortunately this is trial and error because there is no way to see what the setting actually is, as would be the case with a position switch. The trackball also has an on/off switch on the bottom. But this is unnecessary for normal use because it turns off automatically if the trackball isn't being used and turns back on when one of the function buttons is clicked.Overall, I really like this trackball. and highly recommend it. There is room for improvement but for the price it is really loaded with features and has really worked well for me.

Out of the box, I was immediately impressed with the size of this mouse! I am transitioning from the previous Kensington Orbit Wireless Trackball Mouse with Touch Scroll Ring (K72352US) to give y'all an idea of where I'm coming from. Or -- just check out the photos attached and see for yourself! The new mouse fits the same space. It's not the huge monstrosity that the "expert" version of the Orbit trackball is. There ain't much information on this latest trackball -- so I literally was buying this with concerns.Hopefully this review helps others breathe easier -- and make that purchase confidently.One concern of mine was the scroll ring. The concern was that it would be fidgety, like the touch scroll ring was on the older version (in the photo you will see where I disable half the touch ring on the older mouse with putty). Well, I'm happy to report that this is not the case! The touch ring is physical, and has some friction to it. Best way to describe it is matte plastic on matte plastic — it’s not oiled, and so does not have a free-spin. It just spins when you want it to. Strangely enough, I am not finding myself accidentally bumping it either (though I will update this review down the road). So, now I have a RELIABLE scroll ring!Buttons feel the same as on the older mouse — but are positioned at a better angle for clicking.I have a weird way of holding this thing. See, despite the ergonomics, I was getting THUMB strain with the older mouse (possibly due to the angle they’re at), working at my computer 10 hours each day (4 days a week). This forced me to learn to click with my ringer finger (on my right hand), and right-click with my thumb. So with this new mouse, I am using the same fingers — but now I can also use my middle finger for the scroll wheel.Don’t forget the Bluetooth. Y’all Mac users know where I’m at: the BT connection allows you to free up an oh-so-precious USB port!EVEN BETTER: I was thinking of using this alongside the old mouse as I needed one for my work computer and one for my Mac -- but I figured out something better : I can connect the 2.4Ghz dongle to my work computer and then flip the switch at the bottom to use this one mouse with BOTH!Overall, I am impressed. I will update this review down the road as I gain more hours of actual use!UPDATE (After almost two years): So the first one got “sticky buttons” for a brief moment after a year, I was worried it was failing and decided to buy a second one as a back up. No buyers remorse here: it was worth it. Once I stopped transporting the original unit to and from the office — the button problem resolved itself and now I have two perfectly functioning units: one conveniently at home, and one in the office. I put the button issue down to the unit getting smooshed in my bag from transporting it everyday from home to the office.