These Audio Technica Wireless Active Noise Cancelling Over-Ear Headphones ATH-ANC500BT have a lightweight, swivel design making them ideal for travel. Active noise-cancelling technology greatly reduces environmental noise. 40 mm drivers deliver high-fidelity audio reproduction. Includes Bluetooth technology with mic and controls built into the earcup. You can listen for longer with 20 hour battery life (when using both Bluetooth and noise-cancelling). 30 cm USB charging cable included.