WKB-3150UB - Wireless Ergonomic Keyboard with Built-in Removable Trackball and Scroll Wheel, Split Key, Long Battery Life, Small and Portable -Compatible for Laptop/Desktop/PC/Windows XP/7/8/10

I have had one of these for a few years and noticed it seems to be no longer being made so just bought a second one as a backup. It's the only compact TKL keyboard I've found with the trackball and full mousing without a trackpad. My shoulder can't stretch to a mouse so this was perfect.

Been through many keyboards, large, small, usb, wireless, ergonomic, standard, etc. And this wireless, Adesso 3150 fits me perfectly. Have been using it exclusively for the last couple of years.I may have to sit at my computer 8 to 10 hours a day and if I have to continually go back and forth with my arm from the keyboard to a mouse, my arm is pretty worn out by the end of the day. But with the layout of this Adesso, I barely have to move my arm/hand to type, scroll, select, and click.I scroll simply by keeping my hands in the "home" position and using either thumb. If the application I'm using requires and lot of scrolling and moving the screen "cursor" a lot, e.g., the internet (Amazon, etc.), I'll keep my left hand in the "home" position and move my right hand down about an inch to use the trackball with my middle finger, left click with my forefinger, and right click with my fourth finger. All in all very little, if any, movement at all of my left arm and only minimal movement of my right arm. It's quiet and comfortable for as long as I'm using it.No other keyboard that I've tried (many) or viewed comes even close to matching this Adesso 3150 with respect to these ergonomic features. And that includes other offerings from Adesso.The two Triple A batteries required may last anywhere from 4 to 10 months from my experience. I never turn the keyboard off unless changing the batteries or cleaning the trackball (which I may do once a year).I like a steeper slant to the keyboard and purchased an ESC Flip Keyboard stand which I attached to the keyboard bottom that provides this.Initially, the track ball is not quite as responsive as a mouse but with use, it comes to match it.All in all, I recommend it highly.

I bought this keyboard specifically for use while sitting in my lazy boy type reclining chair. After 4 days of use I’ve completely adapted to it and it feels pretty good!About 10 years ago I found that I had way too much shoulder and neck strain while sitting at a desk all day in an upright seated position, and so I threw away my desk and reconfigured my home office around a reclining chair (with monitors positioned to the front and side). The idea of the reclined position is to totally relax my back, neck, arms and shoulders; and so I work with a keyboard on my lap and a mouse located on a small table to the right of the chair. One problem though; I developed a painful repetitive stress injury in my right shoulder from lifting my arm to operate the mouse. That is to say, when my hands are on the keyboard (while I touch type) the weight of my arms is supported by the chair’s arm rests, and therefore there is no stress on my shoulders; but every time I use the mouse I exacerbate the repetitive stress injury I have developed in my right shoulder. And that’s why I went looking for a keyboard that has some kind of built-in pointer controls – so I can keep both hands on the keyboard and both elbows on the armrests at least most of the time.After trying a variety of keyboards with built-in mouse pads that didn’t work out, I arrived at the ergonomically shaped Adesso WKB-3150UB with the built-in track ball and scroll wheel. Frankly I’m surprised this thing works as well as it does considering how un-ergonomic things have become. At the least it does seem to have some very good key design elements that I would say someone on the design team must have had some brains, although there are still some shortcomings.First and foremost it has an excellent ergonomically designed keypad. The angle, in all three dimensions, is perfectly aligned with my fingertips as my hands converge to meet the home row of the keyboard. Every key falls right where you would expect and I have no problem pounding away of this thing without ever looking at where the keys are (i.e. 100% touch type-able). Also important is the shape, feel and surface contours of the keys, which are slightly textured and concave, such that there is an innate tactile sense of the center of each key. Although I know Adesso didn't invent these features, at least they are smart enough to incorporate them!After adjusting the pointer speed (control panel/mouse properties) I have no problem manipulating the mouse pointer using the track ball. I have my pointer speed set to about 40% with “Enhance pointer precision” checked, which seems both fast enough to traverse across the screen as well as slow enough to make fine movements. When needed, I use two hands to operate the track ball and buttons separately, such that I can position the pointer very precisely while making selections, and is also useful for dragging and dropping etc. Otherwise a one-handed technique can be used when less dexterity is required. Importantly, the pointer buttons are raised and slightly textured so there is little to no problem finding them by feel (without looking), although there might be some room for improvement in this area.As I mentioned above, I operate my keyboard from my lap. I'm sure I'm not the only one out there doing this as I know many people use a keyboard with their TV's etc. Although this is not optimized in any way for "lap-top" use, maybe Adesso can consider it as a design criteria for future product development.The true innovation of this product is the embedded scroll wheel, which is fantastic! I consider the scroll-wheel an essential feature of any pointing device. Without this feature I would still be constantly taking my hands off the keyboard to use the scroll-wheel on my mouse. BTW, Windows has no problem with multiple wireless keyboards and pointing devices installed at the same time, so keeping a conventional mouse as an alternate comes in handy when needed.The only downside I’m noticing right now (after a few days use) is that it feels a little too compact around the outer margins. E.g. the palm rest might be a bit small, but actually it doesn’t seem too bad. Aesthetically the body of the device seems a bit plasticy and boxy, which is probably why the keys are a bit noisy. There are no micro-switches, key actuation is actually done by membrane switches that produce no sound when making contact. So, the noise coming from the keys seems to be purely a result of the clunky mechanical nature of each key hitting the top and bottoms stops and the resonance of the plastic frame in which they are mounted.What about efficiency? Because of the excellent key pad layout my text editing and typing speed is way up. Pointer manipulation may not be quite as fast as using a mouse, but the little track ball is really not too bad for speed, especially because you can flick it predictably across the screen from one end to the other.The real test for me will be if I can finally heal the repetitive stress injury in my right shoulder, which will likely take some time. But so far, I am actually feeling less pain because I'm keeping my shoulders more relaxed by keeping my hands on the keyboard most of the time.Update: I just noticed that the scroll-wheel only works 50% of the time; i.e. there is a dead spot every other tick of the detente. This does not seems to be a manufacturing defect, rather it is an inherent design flaw. Inexcusable how a product like this could go to production with such a blatant defect. Two stars off and I'm likely going for a return.