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

Elftear wireless numeric keypad