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Kensington

Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x 6.1" x 8"

    • Based on 7,727 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Nov 19
Order within 7 hours and 1 minute
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Style: Wireless


Features

  • Large 55mm ball design and Diamond Eye optical tracking for precise cursor control; Patented scroll ring lets you scan up and down pages with ease
  • Detachable, ergonomic wrist rest supports hand and wrist for improved comfort; Ambidextrous design
  • Customizable 4-button design, scroll speed and cursor speed via KensingtonWorks software
  • Connects wirelessly via built-in Bluetooth 4. 0LE or with the USB dongle using 2. 4Ghz wireless; Auto-sleep helps conserve battery life
  • Compatible with Windows, macOS (10. 8 and later), and Chrome (OS 44 and later); 3 year coverage and lifetime technical support

Description

The Expert Mouse Wireless Trackball gives you the freedom to be hyper- productive without being limited by a USB cable. The trackball can be paired through Bluetooth 4. 0 LE to save a valuable USB port, or connected via USB Nano receiver. KensingtonWorks software offers incredible customization, and optical tracking technology offers smooth, precise cursor control. Plus, our award-winning Scroll Ring lets you quickly scan up and down web pages or long documents. Add it all up and you get exceptional comfort and ease-of-use from the brand that has set the industry standard in trackballs for more than 20 years.


Wireless Type: ‎802.11a/b/g/n, 2.4 GHz Radio Frequency


Brand: ‎Kensington


Series: ‎Expert Mouse


Item model number: ‎K72359WW


Operating System: ‎Chrome, Windows, Mac


Item Weight: ‎1.35 pounds


Product Dimensions: ‎6.02 x 4.92 x 2.76 inches


Item Dimensions LxWxH: ‎6.02 x 4.92 x 2.76 inches


Color: ‎Black


Processor Count: ‎1


Computer Memory Type: ‎DDR3 SDRAM


Power Source: ‎Battery Powered


Batteries: ‎1 A batteries required. (included)


Manufacturer: ‎Kensington


Country of Origin: ‎China


Is Discontinued By Manufacturer: ‎No


Date First Available: ‎January 12, 2016


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Nov 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

    • After more than 20 years of daily use of a "Expert Mouse 5.0" (Serial/PS-2) here's how I feel on day 1 with this new model...
Style: Wired
As a long time user and huge fan of the older model (that was a different chassis shape) I'm giving this USB Expert Mouse 4 stars out of 5 initially and I will go back and re-review this product further once I get to spend more time using and evaluating it and I really get to compare it to the older version. My only reason for replacing my old one after so many years is because I need USB for a KVM switch and my old one is Serial/PS-2 only. I've read a significant number of less than favorable reviews on here about this newer version that were saying how some users feel this model has either one of 2 problems or both. These negative reviews were mostly from either first time trackball users who were only used to moving a mouse around their desk surface with their arm and had no idea what to expect with a track ball or from users of other (cheaper) brands who were looking for better quality but chose to complain about what they claimed to be a heavy, stiff, bulky movement of this unit's big trackball but some of the lower star reviews it received were also from users who went from older models of the Expert Mouse to this new redesigned model. The other complaint had to do with wrist position comfort and again came from both new users and a few who had an older Expert Mouse version like the one I've been using daily for over 20 years, many of which didn't know what to expect when switching from a mouse to a track ball, and quite a few who already had wrist problems before they bought one of these units to try. Note that my old Expert Mouse trackball still works, even after 20 years of daily use, but I needed USB for a KVM and I couldn't come up with a working PS/2 or Serial to USB converter solution that would stay working after being passed through the USB KVM and/or didn't cost more than the KVM and this track ball cost when purchased together so I opted to replace my vintage Expert Mouse with this one and time will tell if I'll be as happy with this new one as I've been with the original but here are my initial findings at the beginning of day 1 with this new model... As I just took it out of the box, unplugged the PS/2 plug of my 20 year old Expert Mouse, and plugged this brand new restyled USB Expert Mouse into my PC here is what I've determined so far... For whomever has complained about the stiff, hard ball movement, as a regular daily user of an original Kensington Expert Mouse that I've had since I bought it new literally 20 years ago (in the days of Windows 3.1) I must say that they are wrong, period. Although it doesn't feel like it's hovering weightless beneath your fingers as the Logitech products with their smaller ball tend to feel (especially after they literally get greasy from oily hands), it also doesn't feel all slippery with no user feedback like the Logitech products do, and the "massive" ball (as they called it) not only glides as smooth and easy on this new model as the original Expert Mouse did, the ball also has that same solid feel with great control and excellent feedback beneath your fingers as the older models did too! At my office there are several audio editing workstations with Logitech track balls on them (which suffer from left button failures and need to be replaced at least annually) so I'm totally familiar with both brands and types of these products and I'm okay with using the tiny ball and the crazy slickness of the Logitech track balls compared to a traditional mouse but I've always preferred the feel and motion of the much larger ball in my vintage Expert mouse in comparison to those Logitech products and so far the ball in this new version Expert Mouse feels exactly the same to me as my old one has for so many years. I had read in a number of reviews (and some complaints) that the ball's movement was stiff and just had to be broken in over a few hours or a few days of use while others said to literally oil it (which seems excessive) so as soon as I took it out of the box I lifted the ball out of its' opening, rubbed my finger tips across each of the 3 balance points that the ball rests on several times then rolled the ball around between my two hands for a moment, then dropped it back into its' opening and tested the movement and I was totally happy when I found that right out of the box this brand new USB optical model feels EXACTLY like my 20 year old roller driven Serial/PS2 model Expert Mouse does... Smooth, fluid, and well made. Now for the negative reviews with wrist position complaints I can see how some people could be somewhat unhappy with it but it doesn't feel bad to me so far, just a bit different. As a couple of other vintage Expert Mouse users have also stated, this new curved front design does feel very different beneath my hand than the old model from the moment I set my hand down on the ball. The old model was straight across with a high lip which occasionally would begin to slightly bother a small area of my hand between my wrist and first thumb knuckle during long audio editing sessions with lots of left-click/drag thumb action but it gave good lower palm support and was never uncomfortable or a big deal at all. Kensington has obviously put some thought into this and eliminated that big straight high edge front lip which lets me set my wrist and the edge of my palm directly on the desk and that actually feels nice but that also places the ball under the middle of my hand (closer towards my palm) instead of under the middle of my fingers (closer towards my finger tips) which gives the ball a different feel, initially a bit awkward and less familiar but time will tell how my brain chooses to adapt to the new design... If I move my palm back away from the curved front lip a little bit then it places my fingers on the ball where I'm used to with the older model but without the big front lip of the older model the mid-palm support that was provided by the old lip isn't there which leaves the overall weight of my hand kind of pulling down on my fingers a little as they're resting on the ball in the position I'm used to feeling beneath my fingers on my older model of Expert Mouse. I can see where someone with pre-existing wrist issues might not feel totally comfortable with this model beneath their fingers, especially if they have long fingers, but I'm optimistic about the new ergonomics and comfort of my entire wrist being able to rest on the desk and we'll see how my hand chooses to acclimate to the redesigned ergonomics of this newer model once I spend a bit more time using it. I have fairly short fingers, for example I can play a piano reasonably well and I can somewhat manage to play a guitar too but my speed on the guitar is slow and somewhat sloppy because it's a struggle for my fingers to fully reach across the neck and spread as needed around the frets and strings for some chords. Someone with longer fingers may or may not feel like they need more support than this newer model offers compared to the older versions and the new removable palm rest may or may not be a good solution for those who want more wrist support, I don't know yet. At first, without the palm rest I like how my palm rests comfortably on the desk but with my palm up against the contoured front of this model the ball position feels different from the old one under my fingers. With the palm rest on it my fingers can go back to that familiar position on the ball but based on my seating height and arm reach to me the palm rest gives good support but feels a bit thick, raising my wrist considerably higher than I think I'd prefer so far... But since I haven't had much time to use this newer Expert Mouse yet I'll try it with and without the palm rest for a while and post my findings once I decide what feels best for me, or if for some unexpected reason I happen to decide that I don't actually like it with or without the palm wrest compared to the older model's front lip. Time will tell. Therefore, right out of the box I'm giving it 4 stars as I'm assuming it's as well built as my 20 year old one is plus I've already seen that the negative reviews about the ball movement are entirely wrong but the concerns about the redesigned ergonomics are going to take some time and use for me to make an informed decision about, and the scroll ring sounded like a welcomed addition as that's the main reason the bottom left button on my vintage unit occasionally gets a little intermittent during a long day's use after 20 years in service but I'm not sure whether the new model's scroll ring's movement will loosen up or not and I'm not sure if it will stay working when using a KVM switch as most scroll wheels stop responding after switching back and forth between PC's on a KVM which is not the fault of the mouse/track ball but may render that feature useless for me anyway, time will tell on that one too. First impression, I can see why some people might complain about the redesigned ergonomics but the movement of the ball is just as smooth and familiar as the old ones were and so far on day 1 with this new model it's obvious that the ergonomics have been redesigned which does alter the way it feels along the bottom edge of your palm compared to the older models but so far with my first few minutes of use I'm already satisfied with my decision to purchase this new model (only to get the USB functionality that I now need) and I'm confident that I'm probably going to be just as happy with this product as I've been for 20+ years with its' predecessor... UPDATE: Basically 60 days into ownership and the revised ergonomics of this model (versus my original vintage serial/PS2 Expert Mouse) have been totally fine for extended daily usage periods with my short fingers without the optional gel palm rest. The ball still floats nicely while still having good feedback beneath my fingers, literally feels just like my old vintage one, and without even loading the customizing software it does everything just as well as my old one always did, so well that I forget it's not my old one until my fingers happen to feel the new scroll ring that the older ones didn't have. The scroll ring was very crunchy and stiff and jerky while feeling a bit loose and wobbly and made noise at the two stiffest areas as I moved the ring but the more I use it the less stiff it has gotten and changing the windows mouse scroll rate setting has made the scroll ring's action totally predictable and considering the fact that the older ones didn't have any scroll wheel or scroll ring I'm happy to have gotten this capability added even if the quality of the mechanism for it isn't quite as nice as every other part of this very well performing unit. Some users have reported scroll ring failures within about 6 months with regular use. I haven't had mine that long yet but we'll see... Oh, and the scroll wheel DOES stay working when switching between 2 computers with the cheap iogear 2-port VGA/USB/Sound KVM switch so I'm just as happy with this new USB Expert Mouse as I've been with the vintage one I'd been using for over 20 years and wouldn't have replaced if I hadn't needed the "mouse" to be USB for my new KVM. Side note, the SlimBlade version is a similar size with all the same features but has different ergonomics and instead of spinning the scroll ring you twist the ball to scroll which sounded strange to me but after using the Expert Mouse's scroll ring the action seems like spinning the ball instead would basically have a similar overall feel and might resolve the crunchy sandy noisy scroll ring movement complaints that some users seem to be having with the Expert Mouse. I totally understand their point but considering that the older vintage models didn't even have a scroll uption besides programming the upper buttons to step the page up or down the less than perfect physical action feel/sound still makes for smooth consistent actual scrolling so just having that feature on a track ball is enough for me not to care about what I so far consider to be minor physical action issues that could use a bit of refining by Kensington but it does what it should for me so far so I'm happy. ... show more
Reviewed in the United States on March 21, 2016 by Thomas B.
    • The best trackball on the market
Style: Wired
Once, many many years ago, I went over to my friends house and was amazed and very curious about an input device he had plugged into his computer in lieu of a traditional mouse. Ever since then, I've wanted to try out a trackball but never did. Recently I've been using my computer from my bed, my keyboard on my lap, my mouse to my side. This position wasn't that efficient for mouse use, the mouse wanted to slide towards me so i had to put some books under the mouse pad in a very ghetto setup, and prolonged use from that position made my shoulder sore. I decided I would try out a trackball and see if that was better. I did my research and it looked like the kensington expert was exactly what i wanted: a large ball you control with your fingers not your thumb, multiple buttons, had a scroll wheel, the price was decent, it got good reviews, and most importantly looked awesome. And it relieved my sore shoulder. This trackball was everything I was hoping for. - The ball is very large and allow precise movements, which was my primary interest when looking at all the trackballs on the market. I tried out the extremely popular logitech thumb trackball and the thumb movement wasn't for me, it's imprecise and made me sea sick in FPS games. The ball is pretty heavy but once you break it in (ie cover the ball in hand oil) the ball rotates very smoothly and doesn't stick. - The two extra buttons are invaluable. After using a mouse with 2 extra buttons, it would be hard to go back to a mouse with only left and right click. The buttons on this trackball are huge and do take a bit of getting used to. Left clicking with your thumb becomes second nature after a bit of use, but the two upper buttons are more difficult to reach and for me, it took me quite a while to press the upper buttons when I needed to without really consciously thinking about it. Once you get used to it it's pretty awesome though. A word of warning if you enjoying gaming though: moving the cursor + clicking the upper two buttons is kinda difficult, with the upper left button being near impossible (when using your right hand; left hand vice versa). This is probably the worst thing about trackballs in general: you're controlling the cursor with your fingers instead of your hand movement. In order to have smooth cursor movement, it's difficult to press harder to reach buttons or press multiple buttons simultaneously. This negative isn't a deal breaker for me, but it is something to keep in mind. This trackball's software enables button chording (pressing the two lower or two upper buttons simultaneously for a third input [ie press left + right click at the same time to get middle click]) but I hate the software so I can't use it. More on that in the tips n tricks section below. - This trackball has a scroll wheel. It's not bad but I'm not 100% happy with it. The scroll wheel works fine, it scrolls exactly when it's supposed to and it doesn't feel terrible, but sometimes (maybe it's just mine) the wheel doesn't feel very solidly in there, it has a bit of jiggle, but it only feels that way sometimes. In addition the "grating sand" texture isn't amazing but it's not bad. I thought I would dislike it a hell of a lot more after reading all those bad reviews. The scroll wheel isn't bad, it's not enough to drop my review down a star, but I wouldn't say I love it either. - Trackballs are pretty expensive, it seems like they either fall into the overpriced and crappy category, or the overpriced and good category. This trackball falls into the latter. Compared to other trackballs or similar price I would say this is a pretty good value. At the time of this writing, $70 is pretty dang amazing (I bought it for $75). ___ Here are some miscellaneous tips n tricks about my experience with this trackball: * The software that you can download from the kensington website, trackballworks, is the worst piece of crap. Mouseworks or whatever the previous version was called I hear was significantly better and allowed a lot of customization, but sadly it doesn't work past windows XP. The feature I was talking about earlier, chording, is useless if you game AT ALL. The way chording works in this software is thusly: You press a button, but before the input for that button goes through, the software waits about half a second to see if you're going to press another button. This works ok outside of games where you rarely push two mouse buttons at the same time. I thought "oh ok I'll just turn the feature off." NOPE. Even if you don't assign anything to the chord input, there's still a half second delay, AND if you do push both buttons simultaneously, instead of sending both buttons inputs like you would expect, it sends NO INPUT. This effectively makes the software worse than useless for gaming. I called kensington support about this issue I was having and their answer was "that's just a limitation of the software, there's nothing you can do." So I thought "ok I'll just close the software" but for some reason that completely screwed up the scroll wheel, making it act weird as hell. After a few days I had the thought to uninstall the software which disabled chording and restored the scroll wheel's function. If you game, don't install the terrible software. * If you don't install the software but still want to assign different inputs to the buttons than the defaults (left click, right click, button 4, middle click, going counterclockwise from the bottom left button) then install x-mouse button control. I found that program searching for an answer to my question with trackball works. x-mouse button control is amazing, you can assign whatever inputs you want to the buttons, and even have each button do a different thing depending on the program you're in. Just pretend x-mouse button control is the software that comes with this trackball and never look back. * For those of you who are concerned about the reviews talking about the ball sticking, don't worry, after a little use it loosens up. For very precise movements, if the ball is stiff, it won't move at all until you reach a certain level of force, then it will suddenly unstick and the cursor will move way further than you intended. If this is happening, just use the trackball for a few hours and eventually the ball will be coated in natural hand oils. If it becomes smooth and then starts sticking again, trying cleaning the metal contact points the ball rests on with a bit of rubbing alcohol, this always makes the ball roll super smooth again for me. And here's something I recently found out: microfiber cloths are amazing. Wiping the ball for a few seconds with a microfiber cloth made the ball roll like new again and prevents sticking for days/weeks. * This trackball was uncomfortable to me at first. My hand didn't know how to properly use it and my wrist would get sore. After just a few days of heavy use, it became waaay more comfortable to use. It's all about how used to it you are. Don't listen to the negative reviews saying how uncomfortable this trackball is, all trackballs are more ergonomic than mice, and this one is no exception. This is by far the longest review I've written for an amazon purchase but this trackball deserves it. I love this thing. Do your research and buy the trackball you think is best for you, but if you do end up buying this one you won't be disappointed. ... show more
Reviewed in the United States on July 6, 2014 by M. Solomon
    • Great trackball
Style: Wireless
I used the wired version of this trackball for many years before I moved up to the Slingblade trackball, which I like better. However, I recently wanted to get a wireless trackball and the Slingblade doesn't come in a wireless version (Kensington, please offer a wireless version of the Slingblade!). So I got the Expert Wireless Trackball here. It looks like and operates just like the wired version, which is great. It can use Bluetooth or 2.4 GHz wireless with the included USB dongle, both have worked equally well. My only complaint is that when the trackball goes to sleep to save power after a period of non-use, you can only wake it up by clicking a button. Rolling the ball does not wake it up, which I would prefer. It is a minor issue in my opinion though. I've used it on Mac and Windows. Regarding why I like this trackball style and the Kensington brand over over others: the ball is very big and centrally placed, so you use it with your fingers, not your thumb, so it is far less fatiguing. Kensington has proven to be very durable for me, lasting many years. The friction between the contact points and the ball is lower than other trackballs I have tried, making it easier to use. Spinning the ball (Slingblade) and spinning the ring (Expert Trackball) to scroll are very intuitive, I took to it immediately. I've gotten several instances of the Expert Trackball and the Slingblade over the many years since they were introduced, both for work and for home. I hope they keep producing it for as long as I need to use an input device like this. I'll keep buying it. ... show more
Reviewed in the United States on November 14, 2022 by D. Ali

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