Feel the Bass: Made with JBL Pure Bass, the same technology that powers music venues around the world, to put some extra pep in your step, whether you're commuting, at the gym or just vibing to music Unbelievable Comfort: There is nothing worse than uncomfortable headphones, which is why we designed the Tune 670 NC earphones to be as light as a feather, with soft ear cushions and a convenient foldable design Hear Music Like Never Before: Prepare for full immersion with the Tune 670 NC's Adaptive Noise-Cancelling technology, designed to block distracting sounds without tuning out the world completely Long-Lasting Fun: Keep the party going with up to 70 hours of battery life with speed charge as well as convenient additional features like VoiceAware, allowing for hands-free calls and sound management