QMK/VIA software support: QMK / VIA is open-source software for keyboards that allows anyone to program and remap each key easily and quickly. You can personalize your own keyboard layouts, shortcuts, backlight effects, and more. Gasket mount design: The C3 Pro uses a gasket mount structure to reduce sound resonance while adding more typing flexibility. Along with the sound-absorbing foam and the case foam, it provides you with a quieter and smoother typing experience. 1000 Hz polling rate & NKRO: Empowered by the high- performance ARM architecture MCU with 256KB Flash, it provides a 1000 Hz polling rate for a fast and responsive typing speed in your working and gaming. The NKRO feature is convenient to help you enter multiple keypresses at a time. Easy toggle between macOS and Windows: Press the key combo FN + CAPS to instantly change the keyboard working system to Mac / Win. And it accommodates universal keycaps compatible with both systems. Shine-through double-shot ABS keycaps: Made through the ABS double-shot process, the keycaps are durable and wear-resistant. Meanwhile, the shine-through legends lit up by the north-facing LED present a glamorous look at your fingertips. And you can also switch from more than 18 types of rgb backlights. Hot-swappable: The hot-swappable sockets are mounted on the PCB, so you can install or change the switches without soldering. The PCB supports both 3 pin and 5 pin MX mechanical switches.