Enjoy your music with powerful  Bass, from the large 30mm drive units and Bass boost feature. Soft head and ear pads provide maximum comfort, especially during long listening sessions. Keep it going – up to 11 hours of battery life with the large internal rechargeable battery. When the battery runs low, attach the handy included audio cable to keep on listening. The Flat Foldable swivel design makes the headphones compact and easy to store in your bag when travelling.