With the JBL E25 earbuds, you can use Bluetooth to listen to music. This means there are no wires in the way, so you've got all the mobility you need. There's just one thin wire by your neck. This wire has a clip with which you can secure the earbuds to your clothing. Feel free to sprint for a train, because these earbuds won't fall to the ground. In addition to listening to music, you can also use the E25 for hands-free phone calls. The battery lasts for 8 hours.