The knob in the upper right corner is a multi-functional key: volume +/volume-/play/stop,diy kit for keyboard,Hot-Swappable Keyboard Kit
Keyboard case--programmable design, you can adjust light mode and light color yourself, Keyboard Case
Modular mechanical keyboard--with multiple keyboard lighting mode available to meet your needs,Computer Accessory
Wired gaming keyboard DIY kit--it is in stable characteristics, high performance and it is in great reliability, simple, easy to install,PCB Mounting Plate Case
Programmable keyboard DIY kit--equipped with detachable USB -c cable, easy to connect with computer,Mechanical Keyboard Case Plate