Nulea M501 Wireless Trackball Mouse, Rechargeable Ergonomic, Easy Thumb Control, Precise & Smooth Tracking, 3 Device Connection (Bluetooth or USB Receiver), Compatible for PC, Laptop, Mac, Windows.

I REALLY love this mouse in spite of one little downside & one VERY annoying one. The minor annoyance to me is easily overcome. So, I overlook it because the auto sleep mode actually makes sense to me.Ever since getting this new wireless mouse, its worked a heck of a lot better I I have only charged it a couple of times since buying it. One little point to make is that I use my PC A LOT & more of my mouse than the keyboard. So, you would think that the battery would run down faster with all the use I'm getting out of it.NOT A SNOWBALLS CHANCE IN HELL!This thing just keeps on working for weeks on end like a champ & I like using the Bluetooth option over the dongle that can be found fastened to the underside of the frame of the mouse. I like it because....1) … when the dongle is plugged in, it takes up another slot that I could later use for something else.2) … I have yet to see any power indicator if I use the dongle connectivity option so I would have no idea when to plug the unit in to charge it when not in use.The down side to the Bluetooth option... I can't just simply shut off my Bluetooth on my PC when switching my headphones over to my fire TV which also allows for Bluetooth headphones. The mouse will stop working obviously which is a problem because then, I have to go back to my old wireless mouse which does work on a USB dongle plug which I still have plugged in just in case but it has a lot of glitches & it doesn't always work as well to my satisfaction since its wearing out.Anyways, when it comes to the one very annoying downside that I have to live with as I constantly remind myself not to shut off the Bluetooth.Mind you, for the sake of context, I have my PC in my bedroom connected to a large screen TV that also serves my fire cube & all my different gaming systems because of my being a video game nut. I also have to have the PC connected to my TV since my eyesight has been getting poorer as I get older.So, the larger text on the big screen helps me to see better & the new mouse works like a champ! It has a built in battery which is nice unlike my old one which needed a new battery every couple of months or the mouse would glitch on me until I replaced the batter again but these days, it doesn't matter if I have an old or new battery in it. So, now its just used as a backup while this newer mouse just keeps a ticking better than a Timex watch ever did.Lastly, unlike my old remote mouse that would have the roller ball part pop out if I accidently dropped it on the floor, the ball on this one has stayed in when dropped. Its really held together nicely & for the sake of helping the Amazon AI on ticking off all the issues, yes, its comfortable & very accurate so no worries there.lastly, its totally worth the price if you are looking for a affordable wireless option.

Update: Just as I finished this review, I messed around a bit more with the mouse and got it going again. I'm not sure what worked, but I disconnected it and then it started working on the other channel *under the mouse, there are 3 channels to chose from for multiple devices. I guess I will update yet again when it actually dies on me. Again, I have loved this mouse and would/will purchase again when the time comes.I purchased in August, 2022. It has lasted me this long! It just stopped working this week, although the red light is still visible. The lights on the back change from blinking to solid to blinking. The same USB cable does charge my keyboard, so I know there is no problem there.. I never had any issues during the time I've had it and have been very happy with this purchase. I am not on my computer 24-7, so the battery life was a non-issue - I honestly never noticed it was bad in any way. Besides, I have USB hub at my desk, so when the battery went low, I just plugged and chugged right along. Since it is no longer working at this point, I will likely get another of the same design. I have had double carpal tunnel surgery in the past as well as other surgeries on my hands and this design is the most comfortable design for any hand pain. Your hands rests well at a gentle angle, on top of the mouse. There are others that have your hand at a more severe tilt and imo are less comfortable.

My first order of this trackball took a long time to arrive, but it seems to be a worthy replacement for the more expensive Logitech M570. This alternative has better connectivity, and has worked flawlessly for several weeks now. Two distinctions from the M570 and its successor are worth noting:1. The outer surface is treated with a fine-texture "rubberized" coating, similar to the coating on the much more costly Logitech ERGO series trackball. But this texture is finer, and less grippy. In fact, it's almost slippery, and it takes some time getting used to the feel. I'd prefer plain plastic, or a more "rubbery" coating -- this coating feels good to the touch, but the device is hard to grip if you need to slide it around on the desktop. Not a deal-breaker, but a bit less than ideal.2. This trackball turns itself off after several minutes of idle time. That's a good thing, and saves battery. But users who are accustomed to the Logitech trackballs, and many other brands, may not realize that the thing has turned itself off -- because it doesn't turn back on when the ball is moved! You have to click the left button to reactivate it. This is trivial, of course, but if the mouse pointer happens to be over a button when you return to the computer, and the screen has timed out as well, clicking the button may initiate something in the computer software. I've made a habit of moving the wheel a little first, in case it's just the screen that's gone to sleep, but I've had to make another habit of never leaving the computer with the mouse pointer "on top of" a button or menu item. It's a strange little quirk that makes an otherwise near perfect trackball into a strange little nuisance!Users don't always discover the wake-up click, and have complained of a dead trackball often enough for the manufacturer to add some prominent reminders in their materials. Hopefully the next production run will have new firmware that responds to mouse movement, like all the other trackballs in the world.Even with the slightly slippery texture, and the odd requirement of clicking to wake it back up, I WOULD buy this again. The price has recently gone up, though, due to the falling dollar and the rising cost of imports, so if it approaches the Logitech pricing (about $50), I'd probably go back to the M570 (or its nearly identical successor).