Quadcast 2

Press the multifunction button to cycle through the adjustment modes. Turn the knob to the desired level. ​​ *3.5mm Connection Required ​ LED Microphone On - Headset Off = Adjust Microphpone Gain Microphone Off - Headset On = Adjust Playback Volume Microphone On - Hedaset On = Adjust Microphone Moni

HyperX Quadcast 2 User Manual

Here's a diagram of the options with which you can connect and use your QuadCast 2 microphone.