Please drop your email on “Notify Me When Available” if the product model is out of stock. No discount codes can be used for C1 Pro.

Keychron C1 Pro QMK Wired Mechanical Keyboard has included keycaps for both Windows and macOS.

The only difference between version 1 and version 2 is the chip they use.
C1 Pro Version 1 (C1P-A, C1P-B, C1P-H): STM32L432KB 
C1 Pro Version 2 (C1P-K, C1P-L, C1P-M): STM32F402RC