Features: HID standard keyboard, plug and play without a driver This keyboard supports multiple function modes Each button can be set to a different function mode without affecting each other Button function can be set by yourself, there is a dedicated setting program, and the setting can be repeated Built-in storage space, settings are saved to the keyboard, no need to set again when switching devices Supports Windows, Linux, MacOS, Android, Raspberry Pi, etc. Customizable keyboard buttons, shortcuts, multi-step actions, multiple keys in one, copy/paste/cut/undo/redo/select all/play/pause/volume/cut song/forward/backward Specifications: Standard Mode: Keyboard Mode Mouse Mode: Move cursor/click mouse button Multimedia Control: Control media playback, etc. Two-step Actions: Press and lift to perform different actions LED Control: You can control the keyboard's LED to a specific state Game Control: Buttons that can be set as game handles, etc. One Key Password: One key to enter the preset password Package Includes: 1 x 4-Button Mini Keyboard