DIY Design?Hot-swappable keyboard, you can change keycaps and key shafts as you like. Choose from 7 colours and 2 modes (gradient or light up at the touch of a button) for your RGB lighting - create your perfect gaming setup. ?Customization? Copy Keyboard default function is "Copy" / "Paste" / "Cut" . Functions can be set via software, such as Shortcut keys, Cut, Undo, Redo, Select all, Play, Pause, Volume, Switch song, Forward, Backward, Custom script, etc. ?Programming? Programming by Software(https://sikaicase.com/blogs/news/before-software-setting.)Set by Windows System. Programming app and page has an understandable English translation. Easy to use. Compatible with windows7 and above, iOS and Android. ?Mac User Notice?If you need to set it in MAC, please set it in Windows before you can use it on Mac. (USB-C cable required for setup). ?CUT COPY and PASTE Keypad?it comes ready to use with CUT, COPY, and PASTE keys: Plug and Play. No more finger gymnastics with all the CUTing/PASTEing! There is no need to download ANYTHING if these are the functions that you only want. Makes workflow super fast.