1. Customized Functions: The mechanical keyboard can be customized with a total of 3 keys and a knob on the customizable part, each knob can be customized with clockwise, counterclockwise, and pressed functions. 2. 3-Key Layout: The PC keyboard is designed with 3 keys, the number of keys is reasonable and suitable for various programming settings. 3. Programmable: DIY programmable keyboard, all keys are programmable, you can set all the functions of the standard keys for the Windows keyboard, one key to achieve the complex combination of shortcut keys. 4. Type-C Wired Connection: The 3-key mini keyboard supports Type-C wired connection with detachable USB cable, easy to use, compact and portable, effectively saving your desktop space. 5. Applicable Scenarios: The 3-key one-handed keyboard is suitable for office, games, music, media, industrial control, laboratory, production line testing and other fields.