The Koolertron 40 Percent Mechanical Gaming Macaro Keyboard Is A Compact, ??40 Percent Mechanical keyboard?: The latest 40% mini keyboard compared with the popular 60% keys, 87% keys and 104 keys in the market, this 42-key keyboard is more miniature and compact, saving desktop space and making it easy to carry. It's designed for gamer, office worker, copywriter, programmer, video lover, typing teacher and editors.?The latest 40% mini keyboard. ??Full Programmable Macro Keyboard?: 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 won't interfere with each other. ??Macro Keys for PC?: 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 passwords, 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". ??Wide Applications?This one handed keyboard is a huge time saver, you can do programming for a living, for office works, for play gaming, for music, media, industrial control, laboratory, production line testing and other fields. It is easy and quick way to control scenes without needing to move a mouse around. You can use a lot of keyboard shortcuts all day, and you can program each key to be 1 key or a macro of key combinations. ??RGB Backlight Mechanical Keyboard?RGB backlight with multiple effects can be customized to the player's desired color. The backlight brightness can be adjusted/turned off. Dynamic effects can be summarized into 8, each dynamic light effect can be adjusted to 3 different speeds; In addition, you can adjust 30 levels of brightness, 32 levels of saturation, and 32 different colors (including 32 static monochrome and 32 static color) in the light effect. ??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. ??Multi Function Mouse Programmable Can be Added?Added mouse function, which can control cursor movement, click, and slide functions through buttons. ??Combination Keys?You can set "shift+", "alt+", "ctl+", "win+", there are 36 combination keys available for setting.