Product description: Enjoy ultra sound and perfect insulation. Reduce noise by double. Compared to soundcore Q30 headphones. Active noise cancellation reduces noise by up to 98%**. Tested by soundcore in laboratory conditions. Clear high-definition sound thanks to 40 mm dynamic drivers. Long-lasting battery without worry. Up to 40 hours with ANC on, and 55 hours without ANC. All-day comfort thanks to 8° swivel ear cups and the built-in soft headband. 5 levels of adjustable transparency for precise control of what you want to hear from the surrounding world. TCO certified for better sustainability.