JBL Tune 770NC Adaptive Noise Cancelling wireless headphones BlackWhen your music is playing, nothing else matters. The JBL Tune 770NC Wireless Headphones with Adaptive Noise Cancellation deliver that promise all day long and longer while protecting you from unwanted noise. With up to 70 hours of battery life, you can easily get through a tough week of use and still have enough JBL Pure Bass Sound to get you through the weekend. And if you need to charge your headphones quickly, 5 minutes of charging will give you