Sony Extra Bass Bluetooth Headphones

Connectivity Technology: Wireless
Bluetooth audio streaming with AAC and apt-X support and Electronic Bass Boost circuitry for added bass emphasis
Built-in microphone for hands-free phone calling
40mm drivers for wide frequency response
Comfortable around-the-ear design with sophisticated swivel design for portability
Rechargeable battery for up to 20 hrs music and passive mode for normal, corded operation without battery