TRITTON Kunai Stereo Headset for Wii U and Nintendo 3DS - Manual (Page 10)

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Troubleshooting
Microphone isn’t working:
• Make sure that the microphone is properly inserted into the microphone port.
• Check that the 3.5mm stereo audio connector is firmly plugged into the
headset jack on the Nintendo 3DS or Wii U GamePad .
• Make sure that the mic mute switch is not set to mute.
• Make sure that the mic mute option on the Nintendo 3DS or Wii U GamePad
is not enabled .
No Sound:
• Check that the volume on the in-line controller is not turned all the way down.
• Check that the volume on the Nintendo 3DS or Wii U GamePad is not turned
all the way down .
• Check that the 3.5mm stereo audio connector is firmly plugged into the
headset jack on the Nintendo 3DS or Wii U GamePad .