Logitech K780 Bluetooth Keyboard
Here’s why the Logitech K780 is the best wireless keyboard out there: it’s a multi-device option (compatible with all major OS platforms), has a built-in number pad, and has a handy phone and tablet stand that allows you to keep your mobile devices in place and seamlessly switch between typing sessions with the touch of a button. And you get all that for a reasonable price!
The keyboard offers a good blend of comfort and available features at an attractive price point, at least according to the folks at wirecutter.
In addition to Bluetooth, the K780 can also wirelessly connect to a computer via a USB receiver, and is powered by two AAA batteries, which can last up to 2 years between replacements.