The Track Mode when activated would get the GPS coordinates of the device. This is also the default mode of the tracker.
Monitor Mode on the other hand when activated would monitor surrounding sounds including speech. You will be able to hear the conversation that's going on inside the car where the tracker is placed.
To switch from tracker mode to monitor mode just simply send the text command below to your tracker.
Message Format: monitor+password
Text Message Sample: monitor123456
Then, wait for the reply of the tracker, "monitor ok", to verify that the mode has been successfully switch.
To switch back to tracker mode from monitor mode, send the following command:
Message Format: tracker+password
Text Message Sample: tracker123456
And, wait for the reply again from the tracker, "tracker ok".