This cable has two (2) modes: A & B. The “mode switch” can be found at the back of the inline control module. Mode A is recommended for Xbox One, PS4, Nintendo Switch and PC gaming. Mode B is recommended for making mobile calls or listening to music.
This cable will allow you to use your Astro A10 or A40 for Xbox One, PlayStation 4 PS4, Nintendo Switch and PC Gaming. For gaming, we recommend mode A (see the switch at the back of the inline control module). When using mode A, you can mute or un-mute your headset microphone by sliding up or down the mute switch (front control). The wheel control is used to adjust your music or chat volume.
Mode B (at the back of the inline control module) is ideal when your Astro A40 or A10 is connected to your smartphone with 3.5mm jack. The button below the inline mute switch can be used to pickup or hangup a call. When using your Astro A10 or A40 to listen to music, the call pickup/hangup button can be used to pause or un-pause your music. Mode B also enables the inline microphone.

这个线有两种模式可以切换，A模式使用耳机上的麦克风，B模式使用线材上的麦克风 。