That is, straight and level,” said Alan Hedge, professor and director of Cornell University’s Human Factors and Ergonomics Research Group at the time of our interview. “To minimize the risk of injury and to optimize performance, it is important that a keyboard can be used with the hand in its most neutral position. But using a keyboard in that position causes wrist extension. Most keyboards are angled upward from front to back, and some have little feet to angle the keyboard even further.

Typing comfort: A keyboard should have full-size, well-spaced keys that feel satisfying and responsive, not cheap or mushy.

But a keyboard shouldn’t be so small that the keys feel cramped and uncomfortable to type on. Smaller keyboards also take up less room on a desk and are more portable. Most people don’t use the built-in number pad on wide keyboards-and you can get a separate number pad for number-intensive tasks-but if you do need a built-in number pad, we have recommendations for that.

Size: In most cases, we recommend keyboards without number pads because wide keyboards force you to place your mouse farther from your body, which can put strain on your shoulders, neck, and back.It’s flat and well built, but it costs more and can pair with only a single device at a time. If you want a number pad with full-size arrow keys and a navigation cluster, get the Satechi Bluetooth Extended Keypad. The Microsoft Number Pad is sturdy and enjoyable to type on, and it’s the only model we tested that can pair with up to three Bluetooth devices and switch between them. If you don’t use a number pad frequently but do need one sometimes, we recommend using the K380 or MX Keys Mini with a standalone number pad. But the K780 lacks backlighting, and there’s no Mac-layout version.

The K780 also adds a built-in stand for smartphones and tablets, and it comes with a Unifying USB wireless dongle. Overall, the K780 is very similar to the K380-it has round keys, it can pair with and switch between up to three devices via Bluetooth, and it has the same long battery life, software, and warranty. The Logitech K780 Multi-Device Wireless Keyboard is the best choice if you want a keyboard with a number pad that’s more compact than a traditional full-size model like the MX Keys.

15 by 12.3 inches from 0.3 to 0.9 inch tall

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