Concerning this item Cut Down on Noise Up to 98.5%: The Liberty 4 NC noise-canceling earbuds feature an oversized driver, a high-sensitivity in-ear sound sensor, and an inventive noise isolation chamber that reduces noise by up to 98.5% for quiet travel. Noise Cancelling Adjusts to Environments and Ears: For optimal quiet in the midst of the commotion, Adaptive ANC 2.0 performs real-time calculations and adapts to your ear canals and surrounding environment. Clear Audio with 3x More Information: Sound is consistently clear and detailed thanks to 11mm custom-tuned drivers. Discover how Hi-Res wireless audio and LDAC technology make wireless music come to life by transferring 3× more data than standard Bluetooth. Create Your Own Sound Profile: Since different people have different listening preferences, use HearID 2.0 to find the ideal sound profile for