Levels control option(sliders), accessible inside the module (on left), accessible outside the module (on right).

The MM-levels control option is for those using recorders that do not allow the user to change recorder levels while recording or recorders that do not have microphone sensitivity settings! (example: Sony minidisc recorders) we offer optional microphone output level controls. This option provides two individually adjustable slider controls (one for each channel) which allows the user to adjust the output of the battery module (without having to pause your recorder), effectively adjusting the recording level by changing the level of the signal going into the recorder.