Inspired by Marshall heritage, Monitor II A.N.C. headphones are authentic yet modern, delivering high performance sound like youve never heard before. Advanced active noise cancelling technology blocks out the noise, letting you focus on what matters most the music. Featuring custom tuned 40 mm dynamic drivers, these headphones produce a superior signature sound only Marshall can deliver. Engineered for an all-day listening experience, they boast up to 30 hours of wireless playtime with active noise cancelling and up to 45 hours without, meaning youll never miss a beat. While the unique ergonomic construction means no matter how hard and heavy the music, they will rest lightly on your head for the perfect fit. Monitor II A.N.C. headphones are truly made for the long haul.