IOGEAR's behind-the-neck design makes the headphones very comfortable to wear even for extended periods of time. You can also easily change tracks*, adjust the volume, and pause your music with the integrated headphone control buttons. The built-in rechargeable battery offers up to 6.5 hours of music play time. A built-in microphone supports use with Bluetooth mobile phones. You can even pause your music and pick up an incoming phone call with the press of a button.