1. Three Connection Modes: Mini keyboard with custom function, supports Type C cable connection, Bluetooth, and 2.4G wireless connection modes, which can be switched freely without a driver. 2. 3 Adjustment Knobs: Features a 3-knob design, each knob has a click function and can be used as left and right mouse buttons. The knobs can be set for functions like zoom in/out, cut song, previous/next track, volume up/down, pause, play, and more. 3. Programmable: The keyboard is programmable and supports shortcut key overlays with up to 18 characters for one-key output, making it easy to use without tedious steps. 4. Supported Systems: The keyboard has a storage function and is set for Windows systems. It can be used on systems that support USB protocol, such as Linux, OS X, etc. 5. Applications: Programmable keyboards are suitable for office, gaming, music, media, industrial control, laboratories, production line testing, and more.