HID drive-free. After setup on Windows 7 and later, it supports plug-and-play on Linux and macOS. Features memory function—settings are retained and automatically applied when connected to another computer. Multiple keyboards can be connected simultaneously and used normally. Simple software operation—setup requires only a Windows system. Designed to closely resemble a standard keyboard, compatible with most applications and some BIOS environments. Full N-key rollover support—up to 6 keys can be pressed simultaneously with full responsiveness. Detachable key cable for easy portability and office use. Note: Not all functions are configurable on every system. All standard Windows keyboard keys can be remapped or fully replaced. One-key shortcut function: assign multi-key combinations to a single key press. One-key macro function: assign sequential key presses (up to 34 keystrokes) with customizable delays—ideal for tasks like auto-typing passwords. Supports remapping of multimedia keys: volume control, music playback/pause, track navigation, etc. Left, middle, and right mouse buttons can be remapped to replace standard mouse functions. Note: The keyboard case is 3D printed; surface texture may vary slightly between batches, but functionality remains unaffected. Switch type: Green switches Compatible systems: Windows, macOS, Linux Type: Custom One-Key USB Programmable Macro Keyboard Color: Black Material: PLA Package includes: 1 × Custom keyboard 1 × USB data cable Other items not included.