Keychron B2 Pro is a lightweight low-profile wireless keyboard for Apple users that claims 300 hours battery life, advanced customisation with ZMK firmware

Keychron is known for its premium mechanical keyboards, which offer plenty of customisability, great build quality, and excellent typing feel — see our Keychron Q13 Max review for more — but the latest wireless keyboard from Keychron breaks from tradition. The recently announced Keychron B2 Pro is an ultraslim wireless low-profile keyboard that appears to be directed at Mac users more so than PC gamers or typing enthusiasts. 

Instead of Gateron's full-height or low-profile mechanical switches, as found in boards like the Keychron Q1 Max (curr. $195.49 on Amazon) and K15 Max, the B2 Pro uses scissor switches. Over those scissor switches are concave, uniform-height non-shine-through ABS keycaps with a mixed macOS and Windows layout. The layout itself is a compact 96% style, meaning there is a num pad — with a wide zero key, no less — but there is no separation between the num pad and the alphas, and there is no navigation cluster between the num pad and the alpha keys.

At its thickest, the B2 Pro measures in at just 14.3 mm, with the front height coming in at an impressive 8.4 mm. By comparison, the Lofree Flow Lite tops out at 23.5 mm, and the Razer Joro measured in at 16.5 mm at its thickest in our recent review. As a cherry on top of the impressively thin design, the Keychron B2 Pro features hardware mode and operating system selector switches and a built-in storage compartment for the 2.4 GHz dongle. Much like the keycaps, the Keychron B2 Pro's case is also made of ABS plastic, much like the Lofree Flow Lite's, which makes it more portable, at 585 g, but it is also likely to feel somewhat less premium than something like the Keychron K15 Max and its aluminium top case. 

In terms of connectivity, the B2 Pro offers plenty of options, with USB type-C wired, 2.4 GHz via a USB type-A dongle, and Bluetooth 5.2 with support for up to three devices. Over both the wired and 2.4 GHz connection, the B2 Pro supports 1,000 Hz polling, which will be adequate for gaming. 

Perhaps one of the standout features of the B2 Pro is its use of the ultra-efficient ZMK firmware, which enables a wealth of customisation, including on-board macro support and key remapping, and incredible battery life claims. Keychron estimates that the B2 Pro is capable of 300 hours of use on battery, despite the rather small 800 mAh battery inside the keyboard. Customisation is handled by the Keychron Launcher, which has always been one of the strong points of Keychron's keyboards in our previous reviews, thanks to the fact that it is a browser-based configurator and that it is easy to use. 

The Keychron B2 Pro is available from Keychron's online store at just $39.99, although it will likely make its way to sites like Amazon later.