Sony MDRXB950BT/B Over Ear Bluetooth Headphones (Black) Features & details * Bluetooth audio streaming with AAC and apt-X support, Electronic Bass Boost circuitry for added bass emphasis, Passive mode for normal, corded operation without battery. Connectivity Technology: Wireless * Comfortable around-the-ear design, 40mm drivers for wide frequency response (3 - 28 KHZ, with cord), Built-in microphone for hands-free phone calling, Rechargeable battery for up to 20 hrs music * Convenient One-touch listening technology, Sophisticated swivel design for portability, USB charging cable and detachable audio cable included What's in the box: * Micro-USB Cable (1) * Quick Charge 3.0 adapter (1) * Reference Guide (1)