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

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

The trackball doesnt work

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

I've been using this daily now for almost a year and I find it much more comfortable to use and easier on the wrist than a regular mouse. I bought it to try because I was feeling strain from clicking and holding the middle mouse button whilst also moving the mouse which you have to do a fair bit in Blender and other 3D software. This type of mouse solved my problem as I'm no longer fighting my own grip. It's also a space saver as you no longer need to move the mouse around the desk. This is my first trackball mouse but I quickly adapted and within a couple of days I was just as accurate at moving the ball as I was pointing with a regular mouse. I don't have much to compare to but the build quality feels solid. I've not had any connectivity issues or issues with glide or smoothness, and it works well switching between different devices. The battery lasts a few months between charges and you can use it while charging too. The buttons are all nice to click in both orientations (flat or tilted) and the sensitivity is just set once and forget. You do have to pop the ball out to remove dust occasionally but it appears that's just expected maintenance with this kind of mouse. There's a handy hole you can push something through to help with popping it out. I'm really happy with this purchase and it has become part of my every day setup. I'm not sure how it weighs up against more expensive models but I'm happy enough and not looking to upgrade any time soon.

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)

En general me gustó este ratón, no me costó tanto adaptarme a su uso y la comodidad con la mano y la muñeca mejoro bastante respecto a uno tradicional, quizá lo único malo es que los botones no se pueden configurar y se quedan con las funciones que tienen por defecto, pero si comparas el precio con los Logitech ergo S este lo vale

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