Cancel out the world with smart noise cancellation Listen to your favorite tracks wirelessly with a Bluetooth wireless technology by pairing your smartphone or tablet 30 millimeter driver unit for dynamic sound Swivel design for easy travel. Effective Range: Line of sight approx. 30 ft (10 m) Easy hands-free calling and voice assistant commands with microphone Voice assistant-compatible for easy access to your smartphone Next-generation USB type C charging In the box USB type-C cable Power source bype: Ac & Battery