ProtoArc Wireless Trackball Mouse Bluetooth, EM03 Ergonomic RGB Finger-operated Rechargeable Computer Laptop Mouse, 3 Device Connection, Compatible with iPad, Mac, Windows, Black (DE-EM03(Black))

Silent and positive
is is a superb tool that far exceeds the Kensington versions.Hardly a minute from unpacking, I was scrolling around the monitor as smoothly as silk glides off velvet.

Naice
Brilliant, owned a few different brands up to really fancy but this one has exactly what it needs. Yes it will wear on the top surface quickly but my tendons don’t care too much about that. One but! Or if only! Mouse move speed! If that could be a setting then it would be perfect.

Excellent marble mouse replacement
Finally a trackball that can truly replace the Marble Mouse!If, like me, you have found all other trackballs to place the left button too far forward, or found them too stiff, then this is the one you want.Battery life is super impressive, and it can connect using the included dongle or Bluetooth.

The scroll wheel could be in a better position
I purchased this mouse as I have been using the Logitech MX Ergo for the past 3 years, but its’ LMB switch is starting to wear out. In addition, since I had every now and then experienced a strain on my thumb joint, this led me to try a few index-finger trackballs to see whether my experience with them would be superior to my thumb trackball.Firstly, I liked the use of a silent switch for the right click button. It is not stiff (unlike the Orbit Fusion which I recently ordered to compare), it feels nice and easy to press. The left click and side buttons are in a great position, however, my main gripe that made me send back this mouse was the position of the scroll wheel. When I tried using the EM03 for a day, I actually experienced more strain on my thumb joint than with my MX Ergo, as the scroll wheel was in quite an awkward position! I really hope that in a later model, ProtoArc experiments with putting a scroll wheel ring around the ball, similar to the Kensington Expert or the Orbit Fusion – this would be far more intuitive.

I decided to purchase the EM03 Trackball Mouse, despite the negative reviews, because I just love my ProtoArc brand EK01 and EK01 Plus ergonomic Keyboards and wanted to also try their ergonomic mouse (trackball). So I have read all the mixed reviews, and I can honestly say that I don’t see where the negative comments are coming from.In regard to those that say the trackball is not smooth or “sticks”, I have no such issues and I do not even see how that could become an issue. As an engineer myself, I think the design is very creative and would be less prone to developing issues than one that spins on rollers (like the original old school mouse!).I also have had no issues with connectivity. It quickly and easily connects both with the USB dongle or Bluetooth.In response to those that say its uncomfortable (to big or oddly shaped), that is completely subjective and you shouldn’t bother leaving a review to tell others you just couldn’t get used to it… That’s on you, and shouldn’t sway someone else or knock the product (star rating) for that. I would admit that it takes some getting used to, just as anything new or unfamiliar. You get used to how a new vehicle handles, and you adjust accordingly. Same thing here. And I find it to be very comfortable and easy to navigate my 3-screen setup. It takes some getting used to with the new button placement however, you can and will adapt so long as you try.It is a very different feeling than we have been used to with the traditional mouse and button arrangement, but it feels fluid and natural. The biggest thing I struggle with is using my thumb to operate the left-click; as well the button are sensitive therefore Im making some erroneous clicks. Im learning to just keep my thumb on the scroll wheel and then move it to depress the button when needed. But Im still on day one using it, and Im adapting to it quickly.For those that reported negatively that it does not give an audible or tactile “click,” well apparently, they didn’t read the ad! The ad makes it a big point that it’s nearly a silent click. And therefore, one should expect that given the nature of making the click silent, the tactile “click” feeling will too be significantly less. There is still a tactile click, but its very sensitive. So those that say they can’t feel it, they just simply don’t have enough sensitivity in their hand to notice. I don’t see how this would be a problem for anyone, but to each their own. And again, comments like that while its fine to let others know your feelings and opinions, you shouldn’t make it as if there is something wrong with the product and to rate it poorly because YOU didn’t like the fact that you don’t get the “click!” The product ad does NOT try to hide this fact, again, they make it a blatant selling point! So you should have bothered to read it (or look at pictures that displayed this) and then you wouldn’t have wasted your time with a product you knew you wouldn’t like… because it doesn’t click.As to the battery life issue that some have reported, I can not attest to that, Ive had it for a day now. However, I can say that being it’s a rechargeable lithium battery (from China) they are made in bulk and every so often poorly made ones get through QC. While the manufacturer of this mouse will check to see that it powers on and functions properly, they would not be able to test the battery’s life span. The truth is, besides the occasional poorly made battery, these battery’s chemistry is highly volatile, and they can go bad suddenly and without warning. Not to say they are not safe, but we all remember the cell phones blowing up, right?! And on the other side of this, some batteries could have sat around for a long time (either waiting to be purchased by some manufacturer to be used in some product or sitting already installed and in a warehouse waiting for some consumer to buy the item (like this mouse). Either way it happens, the thing is that lithium batteries don’t like to go long periods of time without a charge. More especially, if they didn’t have them charged to a minimum at a specific “storage voltage” and the voltage was below that value (likely after having tested the product) then the batteries are likely to degrade much faster the longer they sit around not getting a charge. And then some poor consumer buys the product with that battery, and automatically blames the product and the brand for having a bad product and for people to stay away from them. This can easily happen with any lithium powered product and not limited to poorly made brands, can happen with big name brands too. That’s why they have return/exchange and warranty procedures in place!This got way longer than intended, I just feel like Im tired of seeing people say things about a product that are completely subjective, even it’s a good product.I am in no way affiliated with this product or brand, I am a happy customer that bought this brand’s products and feel that people should have a right to know that its still a great product regardless of a few “bad apples.” And don’t rate a product badly just because you aren’t in love with it or have some personal gripe (this goes for any product). Write your review, get your feelings and opinions out there, but if the product PERFORMS as advertised its only fair to rate it against what is advertised, not the fact you just couldn’t get on board with it!Give it a shot, the worst that happens is your just not satisfied with it and return it. If you keep it and something happens months later, go through the warranty and get it replaced. They offer a 2 YEAR WARRANTY on their electronics; this is straight from their website and it covers Amazon purchases!

Perfeito para mão grandes. Facilitando demais a ergonomia evitando dores e desconfortos.O uso deste trackball é perfeito e ajudou muito meu dia-a-dia no trabalho.

Die Kugel dreht sich butterweich, die Tasten reagieren prompt, aber fast ohne Kraft und Geräusch! Einzig das Scrollrad spinnt manchmal. Die Tastennummerierung ist schon irgendwie ok, wenn auch nicht perfekt. Aber wenn man Linux benutzt, kann man das eh alles umdefinieren.Als mein Logitech TrackMan Marble FX nach 25 Jahren kaputt ging, war ich verzweifelt, weil die meisten Trackballs nur noch mit dem Daumen bewegt werden. Ich komme nicht aus der SMS-Generation, und mein Zeigefinger ist da beweglicher. Der hier besprochene Trackball erinnert mich so sehr an das bisher gewohnte, dass mein “Leiden” jetzt ein Ende gefunden hat. Ist natürlich alles Geschmackssache.