I run my blackberry (with a 4gb SDmicro card) into my smith helmet via the skullcandy built-in headphones. Play music with the media center, and take calls on the chairlift to pretend like i'm at work, email my assistant, then back to music again. It also has a large pause button on the cord i can hit through my shell if i need to talk to someone. I couldn't tell you how many songs/albums I have on it, but I rode out west for 9 days last year without making hearing the same thing twice.