Sennheiser's PXC480s offer the superb sound quality Sennheiser are renowned for in luxuriously constructed wired headphones that ensure your travels are accompanied by music in first class comfort. Active Noise Cancellation ensures outside noise distractions are kept to a minimum, you can take calls on the go with the built-in mic, and a supremely long battery life ensures your lush listening experience lasts around the globe. Renowned Sound Sennheiser are renowned for the sound quality of their headphones and the PXC480s deliver awesome audio. Read more… Clear and detailed, from deep, powerful bass, up the whole frequency range to vibrant and delicate vocals. Such a rich soundstage provides the listener with a totally immersive listening experience. NoiseGard Hybrid Noise Cancelling Block out ambient noise with Sennheiser's top-of-the-range cancelling system. The NoiseGard Hybrid tech blocks out even the most chaotic environments, like airplane engines. This way, you'll lose yourself in the stellar Sennheiser sound with no distraction. And, in passive mode, you can even use the noise cancellation without listening to music for your own personal ocean of calm. Long Luxurious Listen The PXC480s have been built from premium materials to ensure luxurious comfort, even on the long haul. After dedicated research into the ergonomics of the human ear, Sennheiser have designed the ear pads to stay snug and comfortable for hours on end, and to ensure a top quality listening experience. Fold-flat design and bundled case make them super-easy to slip away discreetly and keep safe. Calls on the Go The microphone built into the headphones means you can take your calls on the go, switching seamlessly from music to talk, so nothing interrupts you. And the nifty Talk-Through feature allows you to hear and talk to people (e. g. cabin crew) without needing to remove them. Long Battery Life Powering the noise cancellation is a battery with exceptional staying power. It recharges via USB and, lasting for up to 50 hours, it ensures you can keep listening in hushed comfort on the longest flight and beyond. And of course, the headphones can continue to be used without the noise cancellation should you find yourself without battery power.