Mini external keyboard:Mini external keyboard for shortcut key setting with 9 keys and 3 knobs. Convenient for various combinations of key settings with RGB backlight and dust-proof blue switch, suitable for games and programming.Knob function:This programmable keyboard has 3 knobs that can be set to zoom in and out, follow the song, volume up, volume down, pause, play and other functions. The functions support presets, and the set functions can be used directly in the new system.Multi-function:The mini keyboard has programmable function, storage function and time delay function.C type to USB interface, plug and play without driver. A convenient and practical external keyboard designed to improve your work efficiency.Delay function:This 9-key gaming keyboard also has a delay function that can be set to a maximum of 6000 milliseconds. Set the appropriate delay response according to your usage habits and needs in practical applications, which can make your work twice as hard.