The JBL S400BT delivers the best possible audio experience- whether listening to it wirelessly via Bluetooth or connected with the included audio cable. It's the latest addition to the JBL Synchros line of headphones, inspired by premier JBL nightclub sound systems found the world over. Unfold its plush earcushions from their collapsible steel headband and prepare to hear the relentless precision of JBL PureBass performance. But JBL doesn't rest on any laurels when it comes to engineering. That's why the S400BT headphones use Bluetooth 3.0 with advanced aptX digital encoding technology to stream the richest wireless audio experience available. Moreover, the headphone features an intuitive touch-sensor interface on its left earcup that lets you adjust music volume, switch tracks, or receive calls with the simple swipe of a finger.