OVERVIEW: Your music, noise free: Lightness, comfort, and great sound. With the JBL Tune 670NC Adaptive Noise Cancelling wireless headphones, you’ve got all three. With up to 70 hours of battery life, the JBL Tune 670NC will get you through your week, with no need of a top-up. And if you do need a quick recharge, 5 minutes gets you an extra 3 hours of music, or just plug in the detachable headphone cable to keep your flow going. The JBL Tune 670NC headphones connect with two Bluetooth® devices...