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: 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, the knob, and hold to rotate left, and hold to rotate right. Five different functions can be set. Knob function Default setting: Rotate left for "Volume -", rotate right for "Volume +", for "Mute", and hold to rotate left for "Screen Brightness -", 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 , for Android, for 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 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 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.