1. This 40% 42-key mini mechanical keyboard is more miniature and compact. 2. All keys are programmable. Custom programmable key functions include conventional 104 buttons Web navigation buttons multimedia shortcut keys keyboard lock Windows lock etc. Each button can be set to any of these buttons. You can connect a keyboard (plug and play) and multiple keyboards to the same computer at the same time and they wont interfere with each other. 3. Macro keys: There are 16 advanced macro function buttons. The macro function can be used in series it can support up to 349 key commands and delay commands can be added to meet various complex usage situations such as: Office CAD/Ae/Pr/Ps shortcuts various user accounts and pasDecorative Model Versions game skills the basic code for programmers. For example a settings button triggers a chain of actions like Ctrl + A 0.5s Ctrl + C 0.5s Ctrl + V 4. 4 layers of custom configuration: Built-in MCU after setting the keyboard keys it can be stored in the MCU of the keyboard no need to reset the keyboard. 4-tier configurations can be saved to handle multiple use cases. Not just for gamers but for many other types of users including designers and video editors. 5. Backlight: RGB color backlight a variety of effects can be selected. 6. Mouse function: Added mouse function which can control cursor movement click and slide functions through buttons 7. Combination keys: You can set shift+ alt+ ctl+ win+ there are 36 combination keys available for setting. Parameter: Number of keycaps: 42 Keyboard Switches: OEM Red Switches Shell material: high quality plexiglass Backlight: RGB Keyboard interface: USB Type-C Rating: DC 5V