The ATH-ANC500BT QuietPoint® wireless over-ear headphones feature Bluetooth® wireless technology. Equipped with proprietary active noise-cancelling technology, the headphones provide a comfortable listening environment in areas with high ambient noise. The ATH-ANC500BT headphones feature 40 mm drivers and provide for approximately 20 hours of continuous Bluetooth and ANC use on a full charge. Foldable earcups make the headphones more compact and easier to transport.