1.INTRODUCTION: This is mini 3 keys keyboard, the keys have the function of customization, through the supporting software to define the keys as keyboard, mouse, string, multimedia and macro definition functions.2.MULTI-SYSTEM COMPATIBILITY: After the software-defined settings based on Windows, it can be used in Dos, All, , Linux, OS, Android and other systems.3.FootSwitch SOFTWARE: Download the latest version of FootSwitch software, install and run the software, switch the device to USB mode (blue light on), connect to the computer via USB cable to customize the settings, save it and it will take effect. (Note: Currently the software only supports system.)4.ERGONOMIC DESIGN: 75x37x28mm size, ergonomically designed keys with curved to fit human fingers, easy and comfortable to . With RGB backlight, it can bring more gaming experience to users.5.WIDE RANGE OF APPLICATIONS: One handed 3 keys macro mechanical keyboard is easy to operate, convenient and easy to carry. Suitable for office, game, music, media, laboratory and other fields, is a good helper for designers and video editors and many other types of users.