ProtoArc Wireless Trackball Mouse, EM01 NL Ergonomic Bluetooth Rollerball Thumb Rechargeable Computer Laptop Mouse, Adjustable Angle & 3 Device Connection for PC, Mac, Windows-Gray BallClimatePartner certified

This product hit all the numbers for me! I've been through countless different roller ball style devices. The manual says you can connect up to three separate computers, I only needed two so the third was a bonus. It connected easily and was plug & play for the most part. With the click of a button I can change between computers/monitors easily. The ergonomic adjustments on this make it very comfortable to use. Its the perfect size and the scrolling device / ball have just the right amount of resistance for easy use. I was skeptical when I purchased this device but its been a homerun for my usage. I charge it every few months... seems to do great with pretty heavy usage.

I apologize for not writing the review right when I got this product; I wasn't really in the habit of doing that. However, I have to say that this product is absolutely worth the money I spent on it! It's comfortable to hold—whether ergonomic or not—and it charges quickly and lasts for a long time. I would recommend this for anyone who has a computer.

The fine motor function of this mouse is choppy and skips as it moves. I have to reduce my mouse speed to 2 for it to be placed accurately over small objects without overshooting. This does not work as I use my mouse on three devices and need to move at a quicker pace. The mouse is new and not dirty. If slow speeds are acceptable to you, then it's an excellent mouse in that regard. Additionally, the description above says it has a DPI change function. This is only available on the EM01, not on this EM01 NL.

I've been very happy with this mouse. Definitely a better deal than the comparable logitech model. The only thing I would change is adding a spot in the mouse to keep the dongle as I don't use it. I keep it just in case there's ever an issue with Bluetooth but like not having too many things plugged in.

It was great until it wasn't. Left click failed after 6 months. I'd say try one of their competitors because they're cheaper and also fail in less than a year of high use. To be fair I use them every day and for hours at a time as a computer geek and gamer. Cheap components though.Unrelated: in this particular model the trackball is a pain in the ass to remove to clean. Not a world ending design failure just an observation.Note: I've been a trackball user for almost twenty years now. They're great but while I used to swear by logitech trackballs, like the rest of this cheap hardware the quality went down dramatically while they remain twice as expensive as items like this.Maybe if you're a light user it'll be fine for you. 6 months isn't great in my book. I haven't found a trackball that doesn't crap out pretty quick anymore and that sad.

I found the ProtoArc Wireless Trackball Mouse to be my new favorite computer mouse! As soon as I unboxed it, every step after felt like a premium product. The packaging was super protected, clean, and stylish in its own sort of way. It is the easiest mouse to connect and use after the small learning curve of a trackball mouse. It is also so comfy, the perfect size, easy on the hand, and I have had no strain whatsoever when using it over long periods of time. Overall, I give this computer mouse a 5/5 stars!

This mouse is awesome! I usually go for the Logitech mouse at home and work, however it drives nutts when the batteries die and you're out. So after spending a couple of hours watching YouTube videos, I decided this try one of these. It rocks! Waiting for my 2nd one to arrive for home use in an hour or so.

Fantastic product if you don’t wanna move your mouth all over a table when you don’t have lots of room, this is ideal. I would never use a regular mouse.