Make sure this fits by entering your model number. Shortcut: All key functions of the standard for Windows keyboard can be set to achieve complex combination of shortcut keys with one key. PROGRAMMABLE KEYPAD: All keys can be programmable. You can set all the key functions of standard keyboard, a key to achieve the complex combination of shortcut keys.(The custom programmable key functions include regular 104 buttons, 8 web navigation buttons, 8 multimedia shortcuts, keyboard locks, locks, etc.) Knob Function: Knob can be set to zoom in and out, switch to the next song, volume up and down, pause, play and other functions, more effective. Knob FunctionThis single keyboard knob can be set to zoom in and out, switch to the next song, volume up and down, pause, play and other functions, more effective.