Desktop custom volume knob: Supports wired and Bluetooth connection modes. Default volume adjustment, mute, and screen brightness adjustment. Customize the button settings (basic buttons, combination keys, multimedia, RGB lighting settings, mouse) according to your usage habits through the software. Bluetooth connection method: Press any button to wake up. Search for the keyboard name "ANTICATER_MIN" on your computer and connect to it. If the keyboard name is not found, try pressing any button to wake up. Knob operation: Rotate left, rotate right, press the knob, press and hold to rotate left, press and hold to rotate right. Five different functions can be set. Knob function Default setting: Rotate left for "Volume -", rotate right for "Volume +", press for "Mute", press and hold to rotate left for "Screen Brightness -", press and hold to rotate right for "Screen Brightness +". Connection method: USB wired + Bluetooth Input voltage: 5V Operating current: Approximately 4-6mA Ambient lighting: RGB (colorful lights) Supported systems: FOR Windows, for Android, for Mac OS, for iOS. Note: 1. When defining button functions, the keyboard and computer must be connected using a data cable. 2. For the first connection, the green light will display for 5 seconds after the connection is reset. 3. When the keyboard is set to continuous string output, the maximum setting is 18 characters. 4. When the keyboard is set to delayed output, the maximum delay is 1 minute. 5. Do not connect to a power supply exceeding 5V. Color: A:Gunmetal Color Material: Aluminum Alloy Package Contents: 1 x Desktop Knob 1 x Charging cable