Sennheiser HD1 Wireless Headphones with Active Noise Cancellation - Black<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Closed back， around-ear design featuring Bluetooth 4.0 technology and immediate pairing to smart devices using NFC connectivity for wireless freedom </span></li><li><span class="a-list-item"> NoiseGard hybrid active noise cancellation blocks ambient noise using 4 microphones for ultimate isolation to dramatically improve sound quality in noisy environments </span></li><li><span class="a-list-item"> 22 hour battery life with both Bluetooth and Noise Gard activated to insure performance during long commutes or plane flights </span></li><li><span class="a-list-item"> Technology uses 2 built-in microphones working seamlessly to improve voice quality and remove external noise during phone calls. 2 year global warranty when purchased from an authorized Sennheiser dealer </span></li><li><span class="a-list-item"> Its especially low profile was optimized for the use on mobile devices. Fitted with jack plugs on both ends， the cable is completely detachable and can be replaced if necessary. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51hZD-3AtCL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41lmRCRYoKL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51ZacjxXQfL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51CpUpuN1BL.jpg" noproxy>