Keychron K3 Pro is an ultra-slim wireless custom mechanical keyboard that allows anyone to master any keys or macro commands on its 75% compact layout through Keychron Launcher web app, it has included LSA (low profile spherical-angled) profile keycaps for both Windows and macOS, and users can hot-swap with Gateron low-profile MX mechanical switch in a breeze ( for RGB Backlight Hot-Swappable Version only ). The K3 Pro is equipped with double-shot PBT keycaps, while the Black (Special Edition) is equipped with dye-sublimated PBT keycaps. Please drop your email on "Notify Me When Available" if the product model is out of stock .