With full QMK and VIA support: Simply connect the K4 Pro to your device with a cable, drag and drop your favorite keys or macro commands to remap any key you want on any system (macOS, Windows, or Linux). An ultra-low-power ARM Cortex-M4 32-bit STM32L432 MCU which is powerful, and equipped with 128K Flash will provide more flexibility for developers. Hot-swappable: The hot-swappable sockets are mounted on the PCB and compatible with almost all the MX style 3pin and 5pin mechanical switches on the market (including Gateron, Cherry, Kailh, etc.), you can install or change the switches without soldering. Pre-installed the pre-lubed Keychron K Pro red switch providing unrivaled linear responsiveness. Upgraded Typing Experience: The added sound-absorbing foam, a thick silicone dampening bottom pad, and steel plate provide responsive feedback and a peaceful typing sound, while added weight will enhance the stability. The big keys (space bar, shift, enter, delete) typing experience