WIRELESS CONVENIENCE with built-in mic and multi-function button to answer calls, adjust volume, even activate your smartphone's voice assist; 20 hours playback on a full charge + 15min quick charge featurePREMIUM AUDIO with Hi-Def sound via Bluetooth and Hi-Res audio at home with a wired connection; powerful 40mm HD driver units, MLF diaphragms and anti-vibration frames provide hours of smooth, natural, dynamic sound, revealing all the subtle nuances in your musicNOISE-CANCELLING with 3 different levels for your daily commute or travel; cushioned carry case includedAMBIENT SOUND ENHANCER lets you clearly converse without taking off your headphones; simply cover the right speaker housing with your hand to activateRELAX IN LUXURY with a 3D ball join structure and plush ear pads for the perfect fit around the head and ears