Sleep Timer lets you fall asleep to your favorite music. You simply start your music, and then set the countdown timer. At the end of the countdown, Sleep Timer softly fades your music out and stops it. Allowing you to get your precious sleep and stops your battery from draining. Listen to music while falling asleep Sleep Timer softly lowers the volume and then turns your music off. It works just like a Sleep Timer on the stereo or TV. Use your favorite music player or even YouTube! Works with