Superior High Definition sound qualityProfessional active noise cancellation This super comfortable Bluetooth Headphone effectively eliminates distracting low frequency background noise while preserving the natural characteristics of source audio all at a switch of a button, significant noise reduction for travel, work and everything in between. Attachable & built-in dual mic design Voice quality can be enhanced via the detachable and flexible boom microphone to ensure impeccable voice quality on both ends of the call, perfect for professional phone calls. Superior hi-fi sound Featuring CSR Bluetooth technology combined with high precision-engineered 40mm stereo drivers, our industry leading headset allows you to experience such an amazing sound quality, you have to hear it to believe it. 35hrs long battery life With a simple 3.5 hour charge, your headphones will allow you to indulge in your movies or tunes for up to 40 hours! Comfortable & super light Designed with you in mind, our Bluetooth headphones feature ultra light, super soft protein earpads with swiveling ear cups, and an adjustable and foldable headband perfect for listening on the go. Crystal clear callsA boom microphone is not included and can be purchased separately.