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 Lifetime of Switch: 60 Million Replaceable keystrokes: Yes, they are hot-swappable. DESIGN Keys in total: 81+ Kob Rotating Encoder Ghost-prevention: Complete keys Lighting: 16 RGB modes ABS plastic is the top material. PBT Dye-Sub ABS keycaps ABS plastic for the core construction No wrist rest Rate of Polling: 1000 Hz 1018g in weight 303.2*104.3*45 mm in size; 1.5 m of cable Compatibility OS: Mac OS X and Windows. A USB port Software Requirement: Windows 7 or later MAXFIT81 Frost Wireless • USB box contents