Function: 1. Provide convenience: this is a 12-key programmable keyboard with adjustment knob, you can set hotkeys to reduce the cumbersome process. 2. Multifunctional: Mini keyboard with many functions, you can set all the key functions on the Windows keyboard and realize complex and complex hotkeys with one key. 3. Memory function: The keyboard has a storage function that can be used on systems that support the USB protocol, such as Linux, OS X, etc. After configuring it in Windows. 4. Setting knob: The knob can also be set using functions such as playing the previous song, next song, volume up, volume down, pause, playback and other functions. 5. Portable and easy to use: Type C interface to USB, no drivers, plug and play, no conflicts between computer and multiple keyboards, convenient and easy to carry. 6. Wide Application: programmable keyboard is suitable for office, gaming, music, media, industrial control, laboratory, production line testing and other fields Specification: Item Type: Macro Mechanical Keyboard Material: Acrylic, PCB Application: suitable for office, gaming, music, media, industrial control, laboratory, production line testing and other fields System support: for Windows, for VISTA, for Linux, for OS X Button life: up to 50 million times Type: Dustproof Green Glass Number of keys: 12 keys Size: approx. 132 x 77 x 38 mm / 5,2 x 3 x 1,5 inches (L) x width x H ) Current and Voltage: DC 5V/1A Operating temperature: -10 -50 List of packages: 1 x Keyboard 1 USB cable Note: This software can only be run temporarily for Windows, try to download it on the PC side, the settings software does not need to be installed, it can be started immediately after opening and will be automatically saved to the Chain Drive when set up, then connect it to the USB protocol, which supports the USB protocol. Use on Linux, OS X and other systems (when you first start, pay attention to the release of antivirus software and set it as a trusted file)! 1. Small keyboard, open custom software on your computer. 2. In custom software, click “button settings area” or “knob settings area” (yellow area), then click the 1-key 12 key or any knob 1 key or knob 2 (green area) that you want to set; if selected, it will appear in red. 3. Click the function key corresponding to the simulated keyboard in the custom software, click download, prompting for the success of the download, you can use the custom keyboard. For example, if you want to set the small keyboard key 1 as a copy shortcut key (CtrlC), click "Key Settings Area" in the software, click "KEY1", then click Ctrl and C on the software simulation keyboard, click Download and the "download succeeded" message will be displayed. Typical troubleshooting methods: Issue 1: When the keyboard is connected to the computer, there is no response or a message appears indicating that the device is malfunctioning. Solution: Check that the cable and interface are properly connected, then disconnect them and insert them again. Replace the USB port on your computer and reconnect it. Error 2: Unable to open custom software after download. Solution: Verify that the antivirus software intercepts the operation and sets it as a trusted file. Question 3: When connected, the computer, why is it always "a" when you press the key or knob? Solution: Output a is the normal factory setting, open custom software to redefine the key function.