?Programming? Programming by Software(https://dl.sayobot.cn/setting.zip)Only for Windows System. Programming by Website(SayoDevice.com)for MacOS,Linux and also Windows Systems. Programming is fairly straightforward, and the programming app and page has an understandable English translation. ?Functions? The default function is "Copy" and "Paste". You can also use other functions, such as Shortcut keys, Multi-step operation, Multi-key in one, Cut, Undo, Redo, Select all, Play, Pause, Volume, Switch song, Forward, Backward, Custom script, etc. You can control the light color and gradient mode of the case you want through the software or website. ?Mac User Notice? Before using, you need to connect the keyboard to the MAC computer, open the webpage link "SayoDevice. com", and manually configure the settings for the two buttons: Left Button=GUI(win)+C, Right Button=GUI(win)+V. ?Copy Keyboard?For Windows User,this is Plug and Play, Out of the Box, no Software and Website Required for Copying and Pasting. ?Package Listing? 1*mini 2-key black keyboard 1*shaft-puller 1*5 feet long USB data cable 2*copy&paste keycaps(black and white).