Turn up the thump with a pair of Sony XB950B1 EXTRA BASS Bluetooth Headphones in black. These headphones connect to your device via Bluetooth 4.1 and are designed with powerful bass response in mind. Bass can be controlled with the free Sony Headphones Connect app. The internal battery lasts for up to 14 hours with EXTRA BASS and up to 18 hours without it. A USB charging cable is included.