Enjoy noise-free travel with Liberty 4 NC featuring 98.5% noise reduction and adaptive ANC 2.0 that adjusts to your ears and surroundings. 11mm custom-made drivers, Hi-Res wireless, and LDAC technology let you indulge in tracks with 3x more detail than regular Bluetooth. And with 10H/50H playtime and fast charging, say goodbye to battery anxiety - shrink the noise, enjoy the ride.