please also read this help article:
How to set the gain (Manual and Auto Gain).
 http://support.mikme.com/mikme-microphone/howtos/howto-set-the-gain

You CAN set the gain when the microphone is in:

  • STANDBYE/IDLE mode (top LED is white)
  • BLUETOOTH mode (top LED is blue) 
  • USB AUDIO mode (top LED is light blue/turquoise)
  • While RECORDING (top LED is red)
    We don’t recommend to set the gain manually on the microphone using the +/- buttons while recording as the sound of clicking the buttons might be heard on the recording.

You CANNOT set the gain when the microphone is in:

  • External STORAGE mode (top LED is orange)
  • PLAYBACK mode (top LED is green) In this mode you can only set the headphone volume with the +/- buttons. 
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