This is a mini keyboard with customizable functions. It has a Type-C to USB interface and is plug and play. You can assign all the functions of the keys on a standard Windows keyboard, allowing you to create complex shortcut combinations with a single click. The keyboard also has a storage function, so once you've set it up on Windows, you can use it on other systems that support the USB protocol, such as Linux and macOS. It's easy to use and portable when connected to multiple keyboards. The dial allows you to adjust functions such as zoom in and out, skip to the previous or next track, increase or decrease the volume, pause and play, making it a great tool for auxiliary operations. Common problems: Problem 1: The keyboard does not respond when connected to the computer, or the device displays an error message. Solution: Check if the cable and interface are properly connected and reconnect them; Replace the USB interface on the computer. Problem 2: After downloading the software, it cannot be opened. Solution: Check if your antivirus software is blocking this operation and set it to "trust". Problem 3: Why is there always an "a" on the button or scroll wheel after connecting to the computer? Solution: The normal factory setting is "a". Open the software and reset the button function. Material: Acrylic Current and Voltage: DC 5V/1A Interface: Type-C Color: Black Package Contents: 1 x Mini Keyboard with 1 Rotary Knob 1 x USB Data Cable