Dyson OnTrac™ Noise Cancelling Headphones (CNC Bronze) Advanced noise cancellation technology effectively eliminates up to 40 dB of noise.A wide sound range from 6Hz to 21kHz delivers rich audio detail.Personalizable earpads and housings with over 200 color combinations.Up to 55 hours of use. Headphones redefined.Advanced noise cancellation technology delivers an immersive sound experience.Restores rich musical details with high-fidelity sound quality and a wide frequency range. Designed for all-day comfort. Wider Sound RangeDelivers extended bass and treble.Most headphones have a frequency range of 20Hz to 20kHz. We've expanded this range, from as low as 6Hz to as high as 21kHz, for greater clarity across the audible spectrum. New Features & Continuous UpdatesCustomizable EQ | ANC Settings | Noise Pollution