Posturite Penguin Wireless Ambidextrous Ergonomic Mouse - Rechargeable Vertical High Precision Computer and Laptop Accessory - Compatible with Windows and Apple Mac - Large, Black/Silver

Bought to try and address a pain in my right hand, this mouse is pretty neat in that you can use it left or right handed. I followed the size guide before buying, even printing off the PDF and matching my hand against the printed picture. This led to me buying the large sized version which I feel is just a little too big - despite my hands measuring comfortably over the "large" indicator line by a good 2cm. So I would advise caution when sizing your hand as it feels like it's a bit larger than it should be. That said, it could be part of the design but it does feel a little awkward.The wireless version comes with a relatively smal USB dongle that the device automatically connects to pretty quickly and it's immediately recognised by Windows as a standard mouse needing no additional drivers. The dongle will protrude from the side of your laptop quite a bit - fortunately there's a little covered reces in the base of the mouse to house the USB dongle when in transit.The mouse has a horizontal scroll wheel and two buttons - these are the active controls that you will use. Sitting underneath your little finger is a switch that changes position when you use the mouse right vs left handed, this effecively reverses the direction of the scrollwheel. It may sound odd but it makes perfect sense when you're using it.The mouse also has a number of resolution settings, which can be altered by pressing a button on the underneath of the unit. This has been a really useful feature for me - if yo'uve never used a vertical mouse before and, especially if you're using your "wrong" hand, then having a super-sensitive mouse is the last thing you need. So i started with it on a relatively low sensitivity meaning I had to move the mouse a large distance to cover one side of the screen to the other. As I got more used to useing the new mouse (and the wrong hand) I was able to turn up the sensitivity, improving my productivity without being really frustrated from the outset.The battery lasts a really long time. A USB charging cable is supplied, and here's my only gripe - rather than using micro USB or USB-C, they've used a proprietary charging port so if you lose the cable you're in trouble. Battery charge is indicated by an LED behing the "penguin/spine" logo on the unit. So far mine has lasted about a month without needing a recharge.It's missing some of the other buttons that I'd come to rely on with my prevous mouse (A logitech Performance MX), like the back button for browsing etc. BUt that's not the end of the world. What's more important is that it has helped me to use my other hand, relieving pressure on my main hand which had started to suffer from the early signs of RSI.So if you're looking to prevent or manage RSI, this is a great mouse. Particularly if you're prone to moving your mouse by flexing your wrist but not moving your arm. This kind of movement can put a lot of strain on your hand - the penguin mouse makes this impossible by resting the heel of your hand on a platform at the base of the mouse itself. The only way you can move it is to move your whole arm, significantly relieving the pressure from your usual mousing style. It's got a few quirks but RSI is something you'd really rather not have, so even though it seems expensive, it's cheap consider the problems it can help prevent.

I have been using this mouse for some weeks at the time of writing. I suffer from some RSI related tendon discomfort from mouse clicking with my middle and fore fingers of my left hand. I tend, with a normal mouse, to flex the whole of my finger from the 3rd knuckle (the one closed to the wrist at the base of my fingers). This mouse has completely eliminated the associated discomfort that I feel in the tendons that control the flexing from the knuckle. It does this by promoting a finger position that encourages the curling of the finger to press the buttons, rather than flexing at one joint. The curling action uses a different set of muscles and tendons and allows the resting of the other tensions and muscles that are the problem. The rest really works as I have been able to use a normal mouse for a day without problems when I have forgetton to pack the penguin. In addition it holds your hand in a neutral position that is good ergonomically. It is a wonderfully designed product and I couldn't go back to a normal mouse now.

certainly improved the tension/spasms in my shoulder/ neck muscles and did not take too long getting to use to it on the PC with either hand. easy to install. Sometimes I press the wheel instead but this is only a minor point and I have to think a little more. However I do wish I had bought it a long time ago so its gets 5 stars

This is a very good mouse to hopefully correct a shoulder problem I currently have. The only problem I have had with it is the size of the base means it is further away from my keyboard than I would ideally like which means I have to reach out a little, though this may actually be by design as it does mean I move my are more

Does exactly what it says on the tin. Bye bye shoulder pain, thank you penguin!!!

brilliant product. no more mouse rsi enhanced further by the fact it can also switch quickly between left and right handed. has even made me a little more ambidextrous! Make sure you buy the right size - I needed the larger model, the smaller one would not have worked with my large hands! If you have just a hint of rsi don't let it get worse (it's horrible!) and don't hesitate buying one of these - does exactly what it says on the tin :) Does take a little getting used to as with anything different, but very easy and way better than any other options i've tried. And excellent customer service too - 'scrolling wheel' started playing up year or so after purchasing - replacement being sent.

Very strange to use at first especially as productivity really matters to me. It took me 2 days full use to really get used to it but after 2 days I checked a normal mouse which then felt really un-natural.I use the Posturite Penguin for 3D CAD which is constantly in use. Even after 2 days my wrist has no more pain especially at night. The Posturite Penguin feels really natural and comfortable and I feel relaxed using it. Highly Recommended!