ProtoArc Wireless Trackball Mouse, EM01 NL Ergonomic Bluetooth Rollerball Thumb Mouse Rechargeable Computer Laptop, Adjustable Angle & 3 Device Connection for PC, Mac, Windows-Purple Ball'25

A perfect mouse for multiple device use, and switching is easier within devices. Very comfortable to use.

Inherently defective scrolling input and scroll wheel and this directly leads to unusability, after few days the scroll become jittery than starts registering opposite scroll inputs to what you give than altogether becomes frustatingly unusable. I returned even though i got a better deal of 3650 instead of usual price of 4100

Initial 2 days working well after that scrolling is very bad and scrolling speed is very bad, it unstable.

avec clavier virtuel car arthrite +++++ aux mains

Nice stylish black trackball with (I choose) a red ball. Luckily no fancy LED lights, and connects to PC and MAC. Great!! What could be improved is a small storage area in the trackball for the dongle (wifi/bluetooth)

Best Logitech trackball yet. Easy to set-up & use on Win 10 & 11.

Best trackball mouse! I have used trackball mouse for a long time. Still using my corded Microsoft Trackball 1 that has long ceased production and with its surface faded badly. I have tried many name brands and no names searching for a replacement, preferably a cordless one. So many failed promises, handsome looking but non working and oddly designed nut jobs! ProtoArc EM01 is the one! I decided to write about it less than one month of usage, a first for me! For electronics, I tended to give it at least a three month break-in period. Here is why I think the EM01 is the best wireless trackball mouse: 1. True wireless! I hooked up to three devices wirelessly all at the same time! My Mac Pro, PC and MacBook Pro running both Mac and Parallels Linux. That is combination of Bluetooth and wireless 2.4. With the selection button on the mouse, the change over is seamless. The working range is fantastic. Also most importantly, under each device the operation is smooth and lag free no matter the OS and software. Clearly the EM01 did right about its software integration with multiple platforms. 2. Comfort! I was not sure about the angular side titling function at the beginning. I was wondering which hand doctor gave ProtoArc about the idea. I decided to give it a try. What a difference! At least for my normal hand, the mouse fatigue is gone! I am serious about this. I am on the computer daily for hours. Even with my beloved wired trackball mouse which is quite ergonomic, after a while the arc of my hand tended to tighten up. And after some time, you hand became tired. Not with the EM01! 3. Just the right amount of buttons and presets. A mouse should be simple! The scroll wheel on the EM01 is perfect! The other four preset buttons which two are customizable are functioning beautifully and at the right position. 4. Battery lasts forever! I did NOT charge the mouse when I first received it. Right away went into using it. The battery indicator has been on 100% the whole time. So the other day, for the sake of it, I plugged it in to charge. Within half an hour or less, I noticed the charging light had gone off indicating there is a charging protectionism in place. All positive! Highly recommended!

This is a brilliant mouse. The ball has a nice smooth glide action coupled with accurate pointer movements. It is very comfortable to use and the tilt action makes it even more comfortable. I thought it was a bit of a gimmick when I read it in the advert, but having used it for a month or three now, the tilted angle is the most comfortable way to use the mouse. The connectivity is good and you can still use the mouse whilst charging. So there shouldn't be any down time.