Microphone sensitivity controls how much sound your Buzz picks up from your environment. This can be adjusted on the band or in the app.
Vibration strength is how strong the motors vibrate on your wrist after picking up a sound. This can only be changed in the app.
To access the microphone sensitivity or vibration strength in the app, click on:
Upper-left menu;
Your Buzz:
Buzz Settings.
You also can change the microphone sensitivity on the band to suit your preference. There are three microphone sensitivity levels. Low (one light), medium (two lights), and high (three lights). Lower sensitivity picks up fewer sounds. High sensitivity picks up the most sounds.