The JBL® Tune 770NC Adaptive Noise Cancelling Wireless Over-Ear Headphones deliver immersive JBL Pure Bass Sound with all-day comfort and powerful features to match. With up to 70 hours of battery life (44 hours with ANC on) and a quick 5-minute charge for 3 extra hours, you can enjoy uninterrupted audio wherever life takes you. Adaptive Noise Cancelling with Smart Ambient keeps distractions out or lets you tune in to your surroundings as needed. Customize your sound with the JBL Headphones App, take hands-free calls with VoiceAware, and easily switch between two Bluetooth devices without missing a beat.