75% Form Factor for Modular Mechanical Keyboard BT + Strikespeed Wireless Multi-Function Customizable OLED Display & Wired Hot-swappable Retro Frosted Transparent PCB Rotating Encoder Knob with a South Facing Design CHANGE Switch type: Gateron Pro V2 or Outemu switch Outemu Red and Outemu Blue (only in ABS version) are the colors. Gateron Pro V2 Brown (available only in PBT version), Gateron Pro V2 Yellow, and Gateron Pro V2 Blue 60 million keystrokes is the switch's lifetime. It is hot-swappable.