When you take your Beleth Ear set 1 out of the case, they're on and ready to use. When you put them in your ears, your Ear set 1 automatically play the audio from your device. If you take it out, audio pauses. Take them both out and audio stops. If you're listening with one ear pod and you take it out, the music pauses. If you put it back in your ear within 15 seconds, play resumes automatically.