TRITTON Kunai Stereo Headset for PlayStation-3 and PlayStation-Vita - Manual (Page 5)

[5]
Connecting the Microphone
2 . Insert the microphone into the port on the left earcup of the headset .
Firmly push it into place, and then twist it clockwise to lock it in place .
3 . Reverse the above steps to remove the microphone .
4 . With the microphone removed, insert the included microphone connector
plug to cover the port .