Keychron K2 Pro QMK wireless custom mechanical keyboard allows anyone to master any keys or macro commands on its 75% compact layout through Keychron Launcher web app, it has included keycaps for both Windows and macOS, and users can hot-swap with any MX mechanical switch in a breeze. Note: The Black - Fully Assembled version is NOT hot-swappable and it doesn't include sound-absorbing foam, silicone pad. The stabilizers are plate-mounted, with 8x6mm pads beneath the stabilizer stems to upgrade the keystroke sound.