Inspired by Marshall heritage, Monitor II A. N. C headphones are authentic yet modern, delivering high performance sound like you’ve never heard before. Advanced active noising canceling technology blocks out the n 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 canceling and up to 45 hours without, meaning you’ll 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.