We have been reviewing Logitech's multi-device wireless input peripherals for a few years now. The Logitech K480 was launched in 2014, and the Logitech K780 and M720 keyboard and mouse were launched last year. The K780 and M720 Triathlon were separate products. The success of these input peripherals has prompted Logitech to introduce the MK850 Performance combo - a full-length multi-device wireless keyboard along with the wireless M720 Triathlon mouse. The combo is made more powerful by the DuoLink feature - using the keyboard to alter the functionality of the mouse buttons and gestures.

The Logitech MK850 Performance combo comes with a single Unifying USB receiver. Logitech also bundles a USB extender for use-cases where the placement of the spare USB port in the PC might result in spotty wireless performance. The combo can be paired with up to three different host devices and easily switch between them. The hosts can be Android, iOS, Mac or Windows devices, and the keys in the keyboard get automatically re-mapped depending on the host OS. Both the mouse and the keyboard have explicit on/off buttons in order to conserve battery life. The keyboard needs 2xAAA batteries, while the mouse needs a single AA battery. Logitech claims battery life of two years for the mouse and three years for the keyboard.

We had talked about how the K780 keyboard addressed the shortcomings of the K480 keyboard. The keyboard component of the MK850 adds a number of interesting features.

  • Ergonomic contour with a raised profile in the middle, suitable for extended duration usage
  • Full-sized keyboard (101 keys) with explicit number pad and full-sized arrow keys.
  • Cushioned palm rest along the lower side of the keyboard for comfortable extended duration usage
  • Availability of multiple tilt angles for the keyboard (0, 4, or 8 degrees)
  • Better typing experience compared to the K480 and K780
  • Ability to use the Fn key to enhance the combo mouse functionality

Users of the K480 and K780 have appreciated the ability to use the cradle to keep their smartphones in an accessible location while using their computers. The MK850's keyboard, however, doesn't have a cradle for mobile devices.

Hardware-wise, the mouse component of the MK850 is the M720 Triathlon (the sticker on the back of the mouse even has the M720 Triathlon label). The mouse is also the component in the package with a compartment to store the Unifying receiver. As part of the MK850 combo, the differences boil down to the DuoLink feature controlled by the Logitech Options software.

The Logitech Options Software

The Unifying receiver bundled with the package is obviously configured to keep both devices active simultaneously. Installing the Logitech Options software presents both devices along with the battery levels and connection method (Unifying receiver or Bluetooth) at a single glance.

The options available for the mouse (standalone) are an exact replica of what we saw in the M720 Triathlon review. Out of the 8 buttons in the mouse, two (the one behind the scrollwheel that controls the rate at which it moves, and the one that switches the host device to which the mouse is paired) can't be remapped. Everything else can be configured using the Options software.

The left and right buttons can be swapped. The pointer speed can be finely adjusted and the scrollwheel direction can also be swapped. The mouse also has a gesture button below the three raised buttons on the left side. The scrollwheel can be swayed right or left for horizontal scrolling (on mobile devices, that acts similar to swiping right or left on the touchscreen). Along with the device change button, we also have the Forward and Back buttons on the left. The scrollwheel can itself act as a middle mouse button. All of these can be mapped to one of a variety of Windows actions.

Activating the Options software when the K850 Performance keyboard as well as the M720 Triathlon mouse are connected provides users with the ability to configure the DuoLink features. The option panels associated with the mouse have a 'Default' and a 'Fn' mode, with the latter configuration intended for activation by pressing the Fn key on the keyboard along with the relevant mouse event.

The K850 Performance's options include the ability to keep the keyboard always in the Windows layout and the option to use the F1-F12 keys as standard function keys (without using the Fn. key qualifier). The configurable keys include the Home button, F1 through F4, F11, and F12. They can be mapped to a variety of Windows functions / programs such as closing windows, Cortana, Calculator etc.

Concluding Remarks

The MK850 Performance wireless keyboard and mouse combo is an important addition to the set of multi-device I/O peripherals from Logitech. They work as advertised, and there is really not much to complain about, except for the lack of a cradle in the keyboard. As mentioned earlier, the K850 Performance keyboard is a huge improvement over the K480 and K780. Evaluation of keyboards and mice targeted towards day-to-day / casual usage is an inherently subjective exercise. In the table below, we compare the specifications of the MK850 Performance combo with some of the other keyboard / mice combos that we have evaluated with a similar approach before. Some subjective scores have also been provided.

Keyboard Bench
Aspect Logitech MK850 Performance
Device Type Keyboard + Optical Mouse (2-button with scrollwheel / middle button and gesture support) Keyboard + Optical Mouse (2-button with scrollwheel / middle button and gesture support)
Dimensions (Keyboard) 16.93" x 8.27" x 0.98"
(Mouse) 2.91" x 4.53" x 1.77"
(Keyboard) 14.96" x 6.22" x (0.87" to 0.32")
(Mouse) 2.91" x 4.53" x 1.77"
Weight (Keyboard) 1.62 lbs / 733 g
(Mouse) 0.3125 lbs / 135 g
(Keyboard) 1.93 lbs / 875 g
(Mouse) 0.3125 lbs / 135 g
Power Source (Keyboard) 2x AAA
(Mouse) 1x AA
(Keyboard) 2x AAA
(Mouse) 1x AA
Communication 2.4 GHz RF and Bluetooth 4.0 2.4 GHz RF and Bluetooth 4.0
Power Saver Explicit On/Off Switches on both Keyboard and Mouse Explicit On/Off Switches on both Keyboard and Mouse
Keys Count 101 (with multiplexed Internet and multimedia hot keys) + 3 (for device switching) 96 (with multiplexed Internet and multimedia hot keys)
Touchpad Dimensions (Diagonal) N/A N/A
USB Receiver Storage Compartment Yes on Mouse Yes on both Keyboard and Mouse
Backlight No No
Keyboard Layout 9.5/10 8/10
Ergonomics (Keyboard) 9.5/10
(Keyboard) 7/10
Build Quality (Keyboard) 9/10
(Mouse) 9/10
(Keyboard) 9/10
(Mouse) 9/10
MSRP (USD) $99.99 (Keyboard) $79.99
(Mouse) $69.99
Warranty 1 year 1 year

While it is difficult to find scope for improvement in the M720 Triathlon, the K850 Performance keyboard's appeal can be enhanced by the addition of a cradle to the design, as well as making the palm rest detachable. As a combo, the whole is more than the sum of parts, thanks to the DuoLink features.

The MK850 Performance combo is priced at $99.99. Given that the M720 Triathlon mouse had a MSRP of $70 at launch, the pricing of the MK850 Performance combo seems pretty reasonable. Logitech has primarily focused on the niche mobile device input peripheral market with their multi-device Bluetooth / wireless models. The design of the K850 Performance keyboard makes it suitable for heavy office use. This will help Logitech address a wider market with the MK850 Performance wireless keyboard and mouse combo.

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  • Xajel - Wednesday, March 22, 2017 - link

    Finally, new successor to MK810... although I would much like a new successor to the brilliant Backlit Wireless K800.
  • Samus - Wednesday, March 22, 2017 - link

    I really wish they would update the decade old DiNovo Edge.

    Slim profile, charging dock, lithium battery, Bluetooth, excellent layout and overall design, premium materials and assembly.

    Update it with a multitouch trackpad (although the touch disc, to this day, is pretty amazing for content consumption) and full backlighting (not just media functions, volume, etc) and it could potentially sell for more than the original did at $150. To this day they sell used for $100 and new for $300-$400. There is a reason why.
  • BurntMyBacon - Thursday, March 23, 2017 - link

    I second this motion.
  • ViperV990 - Wednesday, March 22, 2017 - link

    Can you switch devices as a combo or do you need to switch the keyboard and mouse individually?
  • pookguy88 - Tuesday, October 8, 2019 - link

    that's what I want to know
  • midoreigh - Monday, August 23, 2021 - link

    I will let you know in few days
  • midoreigh - Saturday, August 28, 2021 - link

    You have to switch the keyboard and mouse individually.
  • JoeyJoJo123 - Wednesday, March 22, 2017 - link

    >nonstandard keys on the bottom row.

    blegh... Why can't they just make ANSI/ISO keyboards without trying to make their own unique/funky keyboard layouts?
  • Valantar - Wednesday, March 22, 2017 - link

    Is this a review? All I see is a (more thorough than usual at launch) description of features and design. Oh, and numbered scores for ergonomics and the like? With no description, explanation or discussion? That's nigh on useless. I can see the use of a score as a comparison tool or intro to the general quality, but without an explanation it's pretty useless. How do the keys feel? How do they sound? What's the resistance like? Are the keys tall, short, in-between? Do large keys feel the same as smaller ones? Are they wobbly? Does the plastic in the keyboard flex or creak? Does it stay in place during vigorous typing? Those are the kinds of questions I want answered in a keyboard review. If it doesn't approach them, it's really not a review at all.
  • ganeshts - Wednesday, March 22, 2017 - link

    Dictionaries define a 'capsule review' as a short critique — ranging anywhere from a single sentence to a few hundred words in length.


    If the plastic flexes or creaks, the build quality score would not be that high. This keyboard is meant for heavy office use and is built accordingly. It is NOT a mechanical keyboard, so the keys are soft-touch and don't make much noise. You can get the height and spacing info from the linked spec page in the last paragraph.

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