[One Button Mute Function] button mute function of the USB volume knob can be used with the eMeetLink software. When you need to use button mute function, you can realize one button mute by selecting the conference mode in emeetlink. When listening to music, one key mutes the microphone key pauses the music. [Volume Control]Good voice control. Rotate the button of pc volume control to increase or decrease the volume as needed, there is no need to return to the computer desktop for operation. Great for listening to music, watching , meeting, chatting, or wherever life takes you. [Music Switching]When using the computer to listen to music, the volume knob can provide music switching function, which can switch and pause music without mouse control. When you encounter a song you 't like, you can quickly switch. When the call bell suddenly rings, you can also quickly pause the music. [Visibility of Lights & Custom Button Mode]Good visualization. When using the media controller, you 't need to worry about whether the microphone is . The mute on the screen and the red light of the product can avoid the embarrassment of forgetting to turn off the microphone. By downloading eMeetLink, the usb volume knob can customize the key mode design, change the way of using the controller, and bring a better user experience. [Plug and Play & Strong Compatibility]The usb volume controller is connected with USB cable without installing driver, which realizes plug and play. About device compatibility, the usb volume control can be compatible with windows and forMac . about software compatibility, windows can be compatible with all call software, When using zoom on the for , click mute function is incompatible with zoom, but other functions of the controller can be used normally. Colour:black Material:ABS+metal Package Contents: 1 x USB Volume Control Knob 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.