Unlike normal earphones, Air Tube Ear Phone automatically turns off your music player when you remove it from your ears. How does it work? It has a built-in sensor to detect the changes in the pressure of air inside it. In other words, when you put it in your ears, the pressure simulates the sensor to turn on the music. And it is removed, the sensor powers off the music player. Awesome! It makes it easy especially when your cell phone is in your bag or pocket.