Simple Operation: One hand macro mechanical keyboard, easy to operate, suitable for all computers. Wide Range of Applications: The keyboard is suitable for office, gaming, music, media, industrial control, laboratory, production line testing and other fields, and is a good helper for many other types of users such as designers and video editors. Mini Portable: Mini size and portable, with detachable USB cable, you can connect the numpad (plug and play) and another keyboard at the same time on the same computer, they will not interfere with each other. Programmable Keypad: All keys are programmable. All key functions of the standard for Windows keyboard can be set. (Custom programmable key functions include regular 104 keys, 8 web page navigation keys, 8 multimedia shortcut keys, keyboard lock, for Windows lock, etc.). Knob Function: Not only can be rotated to adjust, but also can be used as a key. The knob can set functions such as zoom in and zoom out, previous track and cut track, following volume up, volume down, pause, play, etc.