Marshall MONITOR II A.N.C. Wireless HeadphonesMONITOR II A. N. C. Advanced active noise cancelling technology blocks out the noise, letting you focus on what matters most the music. 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. ACTIVE NOISE CANCELLING Monitor II A. N. C. headphones utilise advanced active noise cancelling technology that continuously pinpoints