Logitech K780 Multi-Device Wireless Keyboard Review

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  • Pros

    • Can be paired with up to 3 devices simultaneously
    • Supports Android, iOS, MacOS, and Windows
    • Includes numbers pad
  • Cons

    • Not designed to be portable
    • Not rechargeable; uses AAA batteries
    • No backlight for keys

Quick Take

An outstanding office accessory for any tablet user who also has a PC and a smartphone, but isn't right for those who need a travel keyboard.

Logitech’s goal with the Logitech K780 is to provide a single keyboard that works with a tablet, phone, and PC, and can be easily switched between any of the three. How well does this $79.99 accessory meet this lofty aim? Read on to find out.

Design and Build

At first glance, the K780 might look like any other desktop keyboard, but a second look will reveal a slot all the way across the top edge that functions as a cradle for holding tablets and phones. It is deep enough that we successfully used this to securely hold a wide variety of devices, including an iPad Pro, a Nexus 9, and an iPhone 7 Plus.

Logitech K780

Logitech K780 Multi-Device Wireless Keyboard

As this cradle is 14.8 inches wide, there’s room enough for even a large tablet and a big phone side-by-side. There is a limit to how thick the tablet can be, however. Our 0.6-inch thick Surface Pro 2 was too bulky for it, for example. Logitech says the max thickness of supported devices is 0.4 in.

All phones and most tablets can be used in either landscape or portrait mode. Putting really big tablets, like the 12.9-inch iPad Pro, in the slot in portrait mode really isn’t recommended by Logitech, though.

The device angle at which dis determined partially by device thickness, with thinner devices leaning back five to 10 degrees more than thicker ones. The average is between 130 and 140 degrees, which is a decent viewing angle. Still, more flexibility would have been welcome.

Logitech K780

Logitech K780 Cradle Slot

With the whole K780 coming in at 2.0 pounds and measuring 15.0 x 6.2 inches, this isn’t a particularly portable keyboard. That said, it runs off batteries, and wouldn’t overcrowd a backpack or briefcase if taken on the occasional trip.

Build quality is quite good. This looks and feels like a solidly-constructed piece of equipment. It’s primarily made of plastic, though, and flexes very slightly with force — a good reason to keep it on a desktop bound.

The back of the K780 and most of the cradle are a lighter color. Logitech offers this product in two versions, with the only difference being this section is white or an off-white, speckled color. The main keyboard area is a very dark grey verging on black on both of these versions.

Although this accessory is designed to connect to tablets and phones over Bluetooth, it includes a Logitech Unifying USB receiver. This is a small dongle that plugs into a USB port and enables this keyboard to communicate with PCs and Macs that don’t have Bluetooth. This requires extra software on the computer for the keyboard to fully function.


Unlike virtually all keyboard add-ons for tablets, the K780 includes a numbers pad, in addition to all the standard letter, symbol, and number keys in a QWERTY layout.

Logitech K780

Logitech K780 Keyboard with Numbers Pad

Without the numbers pad, the key area is 11.2 inches wide. This is the same size as a typical desktop keyboard because this IS a desktop keyboard. Most keys are round with a 0.65 inch diameter, and 0.1 inches of space between them. They are concave with good travel, and we found them to be comfortable for typing. This accessory sports the Logitech PerfectStroke key system, which intended to produce silent typing. We found the K780 to be fairly quiet, but not silent.

Just above the keyboard is a row of convenient function keys. This includes the three buttons to quickly switch between paired devices. Next to these are a set of multi-media controls for iOS and Android devices, as well as a replacement Home button, a Back button, and a few more. For Windows computers, these are F1 through F12.

There are no backlights for the keys, so typing in low light will be a struggle for most people. There are also no lights to indicate that Caps Lock or Num Lock are activated, either.


The Logitech K780 Multi-Device Wireless Keyboard connects to tablet, phone, and/or PC over Bluetooth, using 128-bit AES encryption. We experienced no issues using it with iOS, Android, and Windows computers. It also works with MacOS, though we were unable to test this.

Shifting between the three devices that can be paired at any one time requires just the touch of button, allowing someone to very quickly switch from typing a Word document on a PC to answering an email on a tablet, and then back, for example.

In our extensive testing, we never experienced a single dropped or duplicated keystroke.

Battery Life

Instead of building in a rechargeable battery, the K780 runs off a pair of AAAs (included in the packaging). Logitech says these are good for up to 14 months of use, but we still prefer the ability to recharge our keyboards, as batteries inevitably run out at the most inconvenient times. As it is, people would be wise to keep a spare pair of AAAs in their desk.

Logitech K780

Logitech K780

This product will automatically turn itself off after a few minutes of disuse to save its batteries. There’s also a power switch on the right side to manually shut it down, or prevent it from being activated by touching the keys.


Logitech’s suggested retail price for the K780 is $79.99. This makes it considerably cheaper than add-on keyboards designed for specific tablets, which typically run $130 or more. On the other hand, it cost more than some general-use options like the ZAGG Messenger Universal ($69.99) or the iClever 3 Color Backlight Bluetooth Keyboard ($54.99). Unlike all of those models, however, the K780 can easily switch between three different computers, making it uniquely flexible.


The standout feature of the Logitech K780 Multi-Device Wireless Keyboard is the ability to pair with a PC, tablet, and phone, and shift between them at the push of a button. It’s cradle also works well to hold a variety of devices, even two or more at once.

We think it’s an outstanding office accessory for any tablet user who also has a PC and a smartphone, but isn’t right for those looking for a travel keyboard.



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