1、4 Keys Design: Multi functional 4 keys keyboard, support up to 18 bit character shortcut key overlay, one key output, convenient and fast. 2、Knob Function: Adjustable knob has a click function, which can be used as the left and right mouse buttons, and can change the songs, adjust the volume and other functions. 3、Excellent Performance: With RGB lights, a variety of light color adjustable. Type C to USB interface, plug and play. 4、Compatibility: Keyboard with storage function, set up on for Windows system can be used on systems that support usb protocol such as, for Linux, for OS X, etc. 5、Wide Application: Suitable for office, games, music, media, industrial, laboratory, production line testing and other fields.