The ATH-ANC40BT QuietPoint wireless in-ear headphones combine Audio-Technica's proprietary active noise-canceling technology with Bluetooth wireless technology to give you greater freedom and listening pleasure in areas of high ambient noise. The wireless headphones reduce that distracting background noise by up to 90% while the 13.5 mm drivers deliver superior sound reproduction. The Bluetooth functionality, coupled with an in-line mic and controls, lets you operate hands-free, wirelessly answering/ending calls, controlling music playback and adjusting volume on Bluetooth enabled devices. The headphones pair with up to eight Bluetooth enabled devices, and can be connected with two of those devices simultaneously, allowing you to shift seamlessly between your phone and tablet, phone and laptop or any other pair of Bluetooth enabled devices. The ATH-ANC40BT headphones also employ aptX sound-improvement technology, specifically created to yield the best-possible audio performance over Bluetooth transmission.