The Logitech Pure-Fi Anywhere contains a battery-saving feature that will shut off the device after two minutes if no music is detected.
NOTE: This is most likely to occur when playing classical music, though other types of music can also trigger the Logitech Pure-Fi Anywhere battery-saving feature.
To resolve this issue, Logitech recommends the following:
Set your iPod volume to at least eighty percent of full volume priot to inserting it into your Logitech Pure-Fi Anywhere.
Set your iPod to a comfortable level prior to removing it from your Logitech Pure-Fi Anywhere.
If setting the volume to eighty percent does not resolve the problem, you may need to change your iTunes settings and enable Apple's Sound Check functionality. For information on changing your iTunes settings and enabling Sound Check, consult the Apple Support website.