ProtoArc Vertical Wireless Trackball Mouse, EM05 NL Bluetooth Ergonomic Rollerball Mouse Rechargeable Computer Laptop Thumb Mice, 3 Device Connection, Compatible with iPad, Mac, Windows, PC-Gray

Basic description: essentially the trackball equivalent of the "vertical mouse."What do I think about it:Excellent.Ergonomic design is fantastic for me. Helps my shoulder vs. other trackballs because the angle of the arm impacts which muscles in the shoulder get used. It's just a comfortable, natural angle that allows my arm to be more relaxed while having good control of the cursor.This is also a much better value than the extra ergonomic Logi[tech] equivalent, which is nearly 2x the cost as I type this. And by the way, you'd have to use the cushion thing the Logi unit comes with to achieve a similar angle. Maybe it's great/fine, but if you want the steeper angle then why have a 2-piece design?Other aspects: Buttons somehow feel crisp while also being quiet. Effort feels just right to me. Weighting of the ball feels just right and it moves very smoothly. Scroll wheel could feel a tad tighter for my liking but this is being very picky; it behaves as I expect/want.Subjectively, the ProtoArc feels higher quality than the Logi M575 I'm coming from. The M575 doesn't feel cheap to me, but this feels nicer/higher end.If you like switching between DPI levels on the fly, there's a button on the mouse for this. I don't use this but the button is not in the way.My only open questions about this unit is how the Li-ion battery and buttons will hold up. The Logi units use plain old AA batteries, which makes them a non-issue to replace (though less convenient than Li-ion in some ways). The buttons fail on Logi units faster than I think they should. Time will tell here but I'm hopeful given that ProtoArc put the time and effort into creating a very thoughtful product.

Un muy buen producto, se siente de buena calidad y es súper útilAl principio es un poco raro para adaptarse a él, pero después de unos minutos de uso es súper intuitivoLo recomiendo 10/10

I had never used a trackball mouse before, so I wasn't sure what to expect. But from the first use, it was incredibly comfortable with no need for adaptation. The minimal wrist and hand movement makes a big difference. My thumb controls the cursor, while two fingers easily manage the silent, premium buttons. The mouse fits perfectly in a handshake position, and I love the texture. With ProtoArc’s 2-year warranty and outstanding customer service, my trust in their products has only grown. Great experience, thank you ProtoArc!

Avant l'achat, je n'étais pas convaincu mais je me suis dit pour le prix, je vais l'essayer. Lors de la réception de la souris, l'emballage est digne d'une grande marque voir plus. Mais quand j'ai vu la souris et j'ai essayé, testé.... Wow ! Sérieusement, la qualité de fabrication, la solidité, le confort (++++), c'est beaucoup mieux qu'une souris d'une grande marque que j'ai eu à meilleur prix.J'ai une grande main et je n'ai pas besoin de replier ma main pour atteindre un bouton, ils sont à la portée de mes doigts. Bref, bien content, pour moi, c'est 5 étoiles.Un seul hic mais rien de majeur, la roulette de défilement, je l'aurais placé plus haut (sur le top) plutôt qu'entre les deux boutons droits et gauche. Mais plutôt de défiler avec l'index, je le fais avec le majeur, question d'habitude à prendre je pense.

Price and use of this ProtoArc Vertical Wireless Trackball Mouse are amazing. Very comfortable to use during long hours. Works wonderfully on PC with a wireless fob and on iPad with Bluetooth. So easy to use that my wrist is at a more natural angle. I’ve been using trackballs for close to 20 years, with different brands and styles, and this one has topped them all with the angle, button placement, and thumb control!