Our Most Technically Sophisticated HeadphonesBuilt for Life On-the-Go: The ultimate companion for your daily listening or travels,the MW65's are our lightest over-ear headphones and feature custom 40mm Beryllium drivers andActive Noise-Cancelling technology to produce an exceptional acoustic experience.Premium MaterialsLightweight anodized aluminum and fine leathers for superior comfortNoise-CancellingTwo ANC modes for clear, expansive sound in any environmentMicrophonesFilter out external noise for clear phone callsHours of Battery LifeCharges to up to 12 hours in 15 minutesBluetooth 4.2 Range20+ meters/65+ feet40mm Beryllium DriversProduce our signature rich, warm soundCable and Flight AdapterOptional cable for extended listening and travelActive Noise-Cancelling TechnologyMaster & Dynamic has taken the time to create an Active Noise-Cancelling technology that doesn't compromise the signature sound quality you've come to expect from us. Two modes of noise-cancellation strength filter out unwanted external noise, designed to focus, inspire and transport your mind wherever life takes you.