Operation steps: 1. Connect the USB cable to this plug & play keyboard to your PC; 2. Basically all computer systems will recognize the executable file ".exe" as a virus, in fact it is not. please close the PC protection software, Download the configuration software in the eighth picture. and open the ".exe" file to start configuring. 4. If you need to set it in MAC, please set it in Windows before you can use it on Mac. (Worry about viruses please do not buy) Programmable Keypad: Type-C to USB interface, HID is driver-free. After setting on Windows, it can be plug and play on Linux, Mac OS, Windows, Pi, etc. With memory function, there is no need to set it again next time. After setting, it can also be used by other computers. One computer can be plugged into multiple Keyboard, can be used normally. Custom Configurations: The mini keyboard supports multiple function modes, each button can be set to a different function mode without affecting each other. Four