Feature: 1. Knob: 12 key custom keyboard, with adjusting knob, the knob can also replace the mouse click function, convenient for using. 2. Compatibility: Mini USB keyboard comes with storage function, which can be set up for Windows and used for Linux, for OS X and other systems. 3. Shortcut Programmable: All key functions of the standard for Windows keyboard can be set to achieve complex combination of shortcut keys with one key. 4. Compact Size: One handed mechanical gaming keyboard is compact and lightweight, easy to carry, will not take up too much space. 5. Wide Application: Mini keypad is suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields. How to Use: 1. Connect the keypad to the computer and open the customized software on the computer; 2. On the customized definition software, click (yellow area) "key setting area" or "knob setting area", and then click the key to be set key1-key12 or any key of knob 1 or knob 2 (green area); when selected, it displays red. 3. Click the function key corresponding to the simulated keyboard on the customized software, and click download to prompt that the download is successful, and our customized keypad can be used. For example, I want&Wide Application: Mini keypad is suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields. Compact Size: One handed mechanical gaming keyboard is compact and lightweight, easy to carry, will not take up too much space. Shortcut Programmable: All key functions of the standard for Windows keyboard can be set to achieve complex combination of shortcut keys with one key. Compatibility: Mini USB keyboard comes with storage function, which can be set up for Windows and used for Linux, for OS X and other systems. Knob: 12 key custom keyboard, with adjusting knob, the knob can also replace the mouse click function, convenient for using.