MK850 Performance - Keyboard & Mouse set

I have always been a avid fan of Logitech from having their PC speaker back in the day to having their keyboards. So it made sense to buy this MK850 Multi device wireless keyboard & mouse Combo when I needed a input device for my custom built PC, tablet & Xiaomi 14 Ultra. The beauty of this MK850 Combo is that at a press of a button I can switch between all three of my devices seamlessly. Previously I would have needed separate dongles or cables, but with the MK850 there is 1 dongle for the PC and my tablet & Android phone connect via Bluetooth both to the mouse & full size keyboard. The K850 keyboard is very nice to use with a comfortable palm rest, soft tactful keys & has a long battery life. The M720 Triathlon mouse has a contoured feel that fits snugly into your hand. The buttons are well placed & once again have a pleasant feel to them when pressed. I use the keyboard combo for home office work primarily however, the combo does perform adequately when I use it for online gaming.

I bought this to replace the Logitech Cordless Desktop MX 5500, as I do a lot of home working. Switching between my work laptop, home laptop and home desktop on my small desk was a pain. No longer, with the MK850 switching is a breeze. This keyboard and mouse can pair via Bluetooth or Unifying receiver to up to 3 devices. Then swapping between paired devices is as simple as pressing one the white keys numbered 1-3, and clicking a button on the side of the mouse to cycle between 1, 2 and 3. The combo comes with a single Unifying receiver. I put this receiver into my home desktop, I paired to my laptop using Bluetooth and my work laptop using a Unifying receiver I have with my older Performance MX mouse (approx 2014). The pairing process was smooth and seamless for the more modern machines. I did try to use Bluetooth for the work laptop but the one I had at the time was older with Window 7 and did not support the enhanced bluetooth needed for these devices. I have a new work laptop now so could try bluetooth with that but it works great with the receiver still in it so I'm going to leave it alone. For the windows 7 machine which had the Setpoint software on it, I had to go into the Unifying software to pair the mouse and keyboard. I had trouble with this the first attempt but it worked fine the next time I tried. However there is a workaround using the unifying receiver if you have trouble pairing with a particular machine, which is to plug the receiver into a different machine, and pair to that using the Options software, then just plug it back in the original machine! The work laptop with its unifying receiver is also still paired with this older mouse that I keep in the laptop case. So when I'm at work I switch on that mouse and it works perfectly as it did. When I'm at home I leave that mouse in the bag and click the device button on the new mouse. It all works very smoothly. If you use the new Logitech Options software (replacement for the older Setpoint software) on all your devices you can configure something called Flow which will seamlessly switch mouse and keyboard between your devices as you move your mouse cursor off one screen onto the other! I haven't tried that yet as I don't have admin rights to my work laptop so I can't install Options on that. Note that you don't need Options to use these peripherals. The keyboard in this set is the K850. I don't know if this can be purchased separately. It has a better more positive action than the MX 5500. With that, many keys would stick a little if you strike them at the corner. This does not happen with the K850 When new it feels quite "rubbery", a very damped travel, and is very quiet. In use however this loosens up considerably and gives the feel similar to many other keyboards of reasonable quality, together with the usual slightly clacky noise you get from most keyboards that get heavy use. It's not a particularly noisy keyboard by any means, but it is a big contrast between new and virtually silent and worn in. It has a traditional key layout with all the function, control and cursor keys in the "right place" for a UK keyboard. The "windows key" is labelled the start key as it has a different function on a mac. The keys with different function or mapping on a mac are labelled such, with a line separating their displayed mac function from the windows function. The keyboard has two tilt angles from the folding support legs, 3 if you count "flat" with the legs folded away, which I use. The main keyboard area has a slight curve for ergonomic reasons but to me it just feels like a comfortable "normal keyboard" in use rather than a special ergo one that would need getting used to. The fixed palm shelf is some sort of soft touch textured rubber with a woven fabric texture. It feels nice but I'm sure it will trap dust and debris and will not be easy to clean. The mouse is labelled the M720 and can be purchased separately as the "Triathlon M720". This is a much less sculpted affair than past mice like the MX Revolution, and a bit smaller. It is clearly designed for right handed users but while not ambi, I think left handers could use it without it feeling too awkard. The issue for left handers would be the button placement. It has two programmable thumb buttons which default to browser forward and back. The button behind these is the device switcher. The free spinning ("Hyperfast scrolling") scroll wheel functions like most mouse wheels as a "third button" if you click down on it, and supports side scrolling if you tip the wheel left or right. Behind this is the mechanical switch button to toggle between free spinning and click to click function on the scroll wheel. Gone is the software controlled function of the MX Revolution but you gain the standard third button function in return. I can't comment much on battery life as I've only owned it for 4 weeks now but the manufacturer claims 24 and 36 month life from the mouse and keyboard respectively, from the non-rechargable batteries supplied. 2 x AAA for keyboard and 1 x AA in the mouse. The Options software still reports battery full for both. Certainly far better than the 2-3 weeks of heavy use from the rechargeable Performance MX and the 4-5 weeks from the MX Revolution. In summary I'm extremely happy with this purchase. I wouldn't have bought either separately without the multi-device capability but even without that capability, the keyboard is the best I've owned and the mouse is about as good as the Performance MX.

I like: The seamless ability to switch from work laptop to my PC without moving the unifier around each time. I like the mouse, which is well made and has two scrolling modes. I don't like: The keyboard is a little small, and the "wrist rest" does not feel adequate (thick) enough to support your wrists. The keyboard feels cheap to me. Okay for work but not great for gaming. I personally would like quieter keystrokes too. Still, I am coming from a Microsoft Comfort Keyboard which was amazing to use and had a great wrist support, but the mouse started to die and the keyboard was probably going to be next (both were 15 years old!) so it was time to change things. So my conclusion....if you frequently PC game, as well as work from home - i would probably go with the new microsoft comfort curve option. However, if you don't game and have a laptop/pc and work from home and want the minimum fuss and ease of use, then this would be perfect. 4/5, loses 1 star because of the small, not very comfortable keyboard.

UPDATE: After a month this keyboard is annoying me. The spongy wrist support is a dirt magnet and already look awful. The lack of separation between F and other control keys makes using the keyboard a pest in low light or when in 'full flow' and when using KB shortcuts. An Example... to increase audio volume you have to hold Fn + F10, if you hit F11 by accident (the keyboard wills you to do this) then you turn off the machine. I urge caution if you are thinking of buying a "full sized, full layout keyboard", this one behaves more like a compact keyboard (it does very well in that role). The lack of dedicated media buttons, keys too close and the dirt magnet make me hanker for my old K330. The multi device support is a great idea but I find 'Mouse without borders' (see below) has made that feature redundant during daily use. Original Review I would recommend this keyboard and mouse combo for daily general use depending on your workflow, I would not say it is the best if you use keyboard shortcuts extensively or for programing (probably not good for gaming either). I love the ability to connect to three machines and save desk clutter - this is the main selling feature and it works well and is a far cleaner solution than the KVM switches of the past. The Keyboard is well shaped, ergonomic and has soft feel keys. You can tilt the keyboard using the usual wee flip out legs on the bottom - Logitech has put two sets of these, one for four degrees and the other for eighth degree - nice! I usually go for the MX 'Cherry Red' clickity-clack keyboards and usually find the louder they are the more I like them, however, I like the feel of the K850 - it is quiet but the keys depress far enough (6mm maybe) to feel 'positive'. I am not a touch typist but almost - I find this keyboard takes my eyes away from the screen more than it should due to lack of grouping of/spacing between ancillary keys, it lacks tactile feedback. This is a full size keyboard, however, the layout has a slightly 'compact' feel to it. The main QWERTY keys are fine but the control keys are not. The function keys have no space between F4 and F5 nor between F7 and F8. I like having F keys in groups of 4 with space between the groups. In similar fashion the ESC key is hard against the F1 key. Further, there is very little physical separation between the number row and the F-key row. In practice, I have to actively look for F5 rather than using peripheral vision/muscle memory or tactile feedback to just find it. The ESC key also suffers the same problem, it is crowded. Other keys that, in my opinion, are too crowded and too small are Shift, Cntrl, Fn and Alt on the left side of the board. In general, this keyboard does not make it easy to find ancillary keys by feel. This does make coding or using keyboard driven complex apps slightly more difficult to use and I would imagine gamers would find this problematic too. I'm quite old school I use keyboard shortcuts extensively and prefer this to using a mouse. However, this layout may suit most users better. The other negative is the key printing (see photo). Logitech have tried to make this keyboard OS agnostic - or rather include key labels for both windows and mac, the result is not pleasing at all. So rather than having the "Win" key you have a key labeled 'Start' in bold white, a horizontal line and then 'Alt' in a grey colour. It's a bit busy but the main keys are cleanly labeled. This does not bother me too much but I imagine it would make finding the pipe or tilde key difficult for less confident PC users. Perhaps this is aimed at users who will connect to a windows and a rain mac/other machine? The wrist support is a soft rubbery type fabric, it feels nice but is an absolute dirt magnet. No One likes a dirty keyboard but we all hate cleaning nooks and crannies so I would not buy this for a teenage boy... This is a poor choice of material in my opinion. The fabric seems designed to trap dirt, it won't just wipe away but gets ingrained into the fabric itself. This will become a big annoyance for me as the KB ages. The Mouse is very good. It has three thumb buttons for forward and back and device selection. I do wish they had separated the forward back buttons from the device select button slightly or made the device selector feel different. It works on a shiny surface but I do notice it is smoother on a proper mouse mat. I'm not too fussy about mice as long as they have a scroll wheel, forward thumb key, back thumb switch and center mouse button. This mouse has all of these plus horizontal scroll. The thumb wheel is good and includes tilt (horizontal scroll). The wheel has two modes, free wheeling for rapid scroll down long documents and a ratchet setting for more precise scrolling - the button behind the wheel selects this. It feels nice in hand and encourages a good arm/hand/finger position. However, the center click are not very easy to use without accidentally 'scrolling'. Probably not a good mouse if you are into CAD. Other than that the mouse feels precise but is also zippy. I use two wide monitors (about 4500 pixels) and can go to screen edges and over to the other machine (see below) without running out of mouse mat. The acceleration algorithm is really good, I am quite happy with the default settings but it is configurable in software (and most OS's...). Multi-Device Support You can pair the KeyB/Mousey combo to 3 devices via Bluetooth or the (1 included) unifying receiver (tiny wee usb dongle). You can use the unifying receiver one one machine and Bluetooth on others or all bluetooth or all unifying receivers (only one included). It just works and just works very well. Once setup, you just press one of the numbered white buttons to select the device and pair to that device - you have to do this on KB and Mouse which is annoying but this also allows you to be mousing on one PC while 'boarding' on another (should you care to do that, why I do not know). Software Logitech Options is the software suit which allows you to adjust mouse and keyboard settings, key assignments (per application), mouse speed etc - it is a reboot of 'Setpoint'. You can also install advanced features such as 'Flow' (move mouse from one PC to another). I installed Options, got annoyed because it wants to connect to 'the cloud' and then discovered a conflict between Options and my own custom software (to allocate keys etc) - my audio volume became uncontrollable so I uninstalled Options. I tried 'Flow' briefly but found it to be more of a dribble than a steady flow, perhaps my mouse has prostate problems? To be fair, my setup is a bit complex and my main PC probably has old copies of Setpoint and other trash that conflicted with Flow. I need to reinstall this PC and maybe try again. There is good support on the Logitech website and people seem to like it but I did not persist with Flow - there are better alternatives. In general, I dislike Logitech's software and find it works best when uninstalled;) Modern operating systems are more than capable of using all the standard features without adding bloated control apps. While it allows you to customise the combo I find there is no *useful* function that can be achieved within applications or by small third party utilities. I must say, 'Options' is optional, it's not needed to use the combo with multiple devices. Alternative to 'Flow' [MS Mouse Without Borders, Windows only] If you have a need to move the mouse/kb between Windows machines then you should search for "Microsoft Garage Mouse without Borders". This is a MS app that essentially shares any mouse/KB between all (Windows) PC's. I have two Win 10 boxes on my desk. Number 1 has the Logitech KB/Mouse connected via Bluetooth while the second machine has an old wired KB/mousie - I can use either mouse on either machine (and also share clipboard etc) just by travelling the mouse over (KB follows mouse). As the Logitech is only paired with one machine I can still connect it to two other devices! So, my setup with regard this product is as follows. I use Mouse without Borders to share KB/Mice both ways between my two Windows 10 boxes - this is only one of the three connections. Device Two is a Linux box. Device Three is a Tablet (using BT). The Bluetooth setup was seamless. Switching between devices is flawless and very satisfying. Recommended? Yes, it does work very well. it is built well and any problems with Logitech's software are most likely easy solvable and options to Options exist. I will probably look for another fuller 'full sized' keyboard with better tactile feedback for my coding/CAD/Photoshop machine and consign this KB/Mouse to my 'office' machine and for tablets etc. Just one more Inch! Had this just been an inch bigger and the ancillary keys spaced better ... sometimes an inch really does make all the difference!

The keyboard and mouse came in good packaging, with batteries included (one AA for the mouse, and two AAA for the keyboard). The keyboard is in UK English layout (that is the one I ordered). Please read through below and consider your own purpose and preferences. Some of what I consider an advantage may not be seen as so from a different point of view. I use the mouse and keyboard for general typing and for programming. I use Windows and Mac (not tested for mac yet). I have had this product for 3 days now. Advantages: - Keyboard has a full numpad and functionality buttons (ins, del, home, end, page up, page dn). - Keyboard has an indicator for when the Caps lock button is on. - Keyboard buttons are firm and do have a smooth "press" feel to them. The keys are not shallow (like laptop keys), but rather sink in when you press them. (I see this an advantage, you may not). - The keyboard has 3 buttons that are dedicated to switch between 3 devices. I have not used this functionality yet, but definitely useful as I use a work computer and 2 personal computers. - The mouse has a button (next to your thumb) dedicated to switch between devices. Each time you click the button, it switches to another device. It also shows you if you are connected to device 1, 2 or 3 via illuminating numbers on the mouse. - The mouse is slightly large in size and is comfortable to use. I prefer large mice than smaller ones. Only larger devices I have used before are technical ergonomic mice that are ordered specially. - The mouse click does have a sound and feel. I see this as an advantage. Unlike other mice that are extra smooth and do not make any sound or have minimal click response. - The mouse has 3 customizable buttons (next to your thumb rest) that you can use for almost anything! this is a great functionality that was not in the product description (at least I did not see it). I have set one to copy and the other to paste. I have always been looking for a way to copy/paste simply with the mouse (like in Linux). It is very easy to customize and change the mouse settings using the software (installs automatically on Windows 10). Disadvantages: - No indicator for when Num lock is on. - The keyboard is about 45cm X 15cm. The width is slightly big (not too much). In order to use keyboard and mouse, my mouse arm needs to be away from my body (slightly less ergonomic). - No automatic power saving option that is available in other keyboard and mouse sets. To consider: - The keyboard has a rest pad at the bottom (as seen in the photos). You may or may not like this. - The scroll of the mouse is like a wheel. Unlike other mice (that I am used to) that rotate in discrete manner and stop. This scroll rotates like a free wheel continuously until you stop it (think of spinning the wheel of a toy car). Overall, a very good set I would recommend. I had bought a set last week (around £20) and decided to replace immediately with this one.

Brilliant keyboard and mouse unlike the K950 Signature which had a totally crap feel about the whole combination. Thin, small and flimsy giving a cheap feel overall. This combination feels nice and solid to the touch. reminding me of the other makes 5050 which has now gone up to an truly rip off price. I have always liked Microsoft gear but this one but this one can certainly match them in every way. Keys are nice and light and quiet. Just the right shape for hours at a keyboard with a mouse. Both keyboard and mouse are a perfect match.

I don't normally write product reviews, but in this case I feel very compelled into writing one. First of all, it's a very beautifully made product. Looks and feels expensive and does it what it's meant to do. Quality product through and through. However, two things really killed it for me: 1. This product comes with a keyboard and a mouse. You would have thought they would work together? Wrong! When you switch between two PCs, you'll have to switch the keyboard and the mouse, separately! How annoying is that? Who would want to use mouse on one PC while typing on another? Why wouldn't they just make the keyboard and mouse switch at the same time, with one button? It is beyond me. Don't get it. 2. This product is not a low end keyboard mouse combo. There are some really nice things you can do with it. However, there is an extreme lack of information on what you can do with this product. I've had to browse through the internet and youtube to see how to set them up. The product comes with a Unifying dongle but there is no way you will know what it means and what you can do with it unless you look it up extensively on the web. Unbelievable. 3. The switch on the mouse is very inconvenient. On the keyboard there are three buttons. You press button 1, the keyboard switches to PC 1; button 2 for PC 2; button 3 for Pc 3. Nice and simple, and intuitive. However, on the mouse, although there are also 3 device buttons, they don't work in the same way as the 3 device buttons do on the keyboard. You have to press button 3 on the mouse to SEQUENTIALLY switch between the PCs! For instance, when I am on PC 2 and want to switch to PC 1, I can't just press button 1. Instead I have to press the switch button (button 3) three times to go PC2 -> PC3 -> PC1! This control is just anti human.

The keyboard and mouse are of good quality. However, having spoken to logitech support, there is an issue when using options plus with flow in that when switching between computers the keyboard key appears to be stuck as 'pressed'. I purchased the item as I thought it was a fault with my previous K850, and would return the item but according to support this affects all logitech options keyboards. (I like to use options as it allows me to copy data between computers.)