The mic I had clipped to my shirt came loose from the digital recorder at different times during the presentation. I needed to switch over to one of two other mics (one was on the laptop computer and the other was on the video camera). Neither mic picked up my voice as well but they both work. You'll just hear a change in voice quality 6 or 8 times throughout the presentation. Just wanted to mention this in case you thought there was something wrong with your system.