Introducing the JBL T450BT cordless earphones. They are fold-flat, lightweight, comfortable and compact. Under the headphones earphones, there are a couple of 32 mm seriously blasting drives, reproducing the JBL Pure Bass sound that you've experienced at much larger venues. The music / phone / microphone controls are located on the headset. And because your music should go wherever you go, you can achieve up to 11 hours of uninterrupted sound playback per charge.