Description: USB interface, plug and play, no any drive needed DIY customize keyboard, setting any definition Each button can be set to a different function mode without affecting each other The button function can be set by yourself, there is a special setting program, and the setting can be repeated Onboard storage, the setting is saved in the keyboard, if the device is changed, there is no need to set it again Support for Windows, for Linux, for Mac OS, for Android, for Raspberry Pi, etc.   Supported functional modes: Default mode: keyboard mode Multimedia control: control media playback, etc. Two-step operation: press and lift to perform different operations LED control: you can control the keyboard LED to a specified state Game controller: buttons that can be set as game handles, etc. One key password: One key to enter the preset password Package: 1x 12-key Keyboard     Remark:  Instruction Manual:  https://sayodevice.com/help/std/en/web-device/string.html  Download link of keypad custom key program:  https://key.itytsoft.com                                                                                                                                 hello, guys, thank you for visiting my store.You can contact with us to get more detail of the goods .we will be ready to reply you ASAP.