The Keychron K2 Pro is a compact wireless mechanical keyboard that works with Mac, Windows and Linux. It has a 75% layout, which keeps the arrow keys and function row but saves desk space.
You can connect it by Bluetooth or USB. Keychron lists up to 260 hours of wireless use with the backlight off, so battery life is not a daily worry. The keycaps are double-shot PBT, which resists shine and wear, and the keyboard is customisable with QMK/VIA software.
Most variants are hot-swappable, which means you can change the switches without soldering. Note that the Fully Assembled version is not hot-swappable, so check the variant before you buy.
Who it is for: people who type a lot and want a reliable, customisable wireless keyboard. For another option, look at the Keychron K8 Pro.
Specifications from Keychron. Image: Keychron (keychron.com).