WIDE APPLICATION: USB volume control knob is Compatible with a variety of system devices, suitable for mobile phones, tablets, notebooks, desktop computers, compatible with Windows and Andriod systems.<br> Support wired USB, wireless 2.4G dual mode, with a rotary encoder.<br> FUNCTIONS AND USES: USB volume controller can directly control the volume of the computer operating system<br> FLEXIBLE AND ROTATABLE: The spindle of the PC USB volume control knob supports 360° rotating, making it more strong and suitable for long periods of use.<br> WITH LIGHT: USB volume controller knob with RGB light, can only switch, Type C interface, plug and use.<br> EASY TO USE: There is no need to install any drivers or software on your computer to drive this volume regulator, and can be used after plugging in the device.<br> Default volume control function, clockwise to reduce the volume, counterclockwise to increase the volume, press the knob to mute.<br> Item Type: USB Volume Control Knob<br> Support: For Android systems<br> How to Use: Insert the USB cable, RGB lights will turn on. Press the knob for 2 seconds to turn off the lights, press again for 2 seconds to turn on the light.<br> Note: Customization is not supported.<br> Color: Black<br> Material: Acrylic + Aluminum Alloy<br> Package Contents:<br> 1 x Volume Controller<br> 1 x Type-C Cable<br> 1 x 2.4G Receiver<br> Only the above package content, other products are not included.<br> 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.