SleepPhones Effortless are wireless, soft, and stretchy headphones. All electronic components in the headband are less than 4mm in thickness, including the 13-hour battery. That means you can comfortably sleep in bed while wearing SleepPhones all night long. Simply press a button to turn on the music. It pairs with your Bluetooth-enabled phone and will play all music apps such as iTunes, Pandora, Spotify and the SleepPhones sleep music app.