Sony Premium Lightweight Wireless Bluetooth Extra Bass Stereo Headphones for Apple Iphone/Android Smartphone (Black) Bluetooth - Enjoy high quality Bluetooth audio streaming and simplified connectivity with Near Field Communications (NFC) technology. Simply align your compatible devices and touch the NFC logos to activate or deactivate pairing. With built-in AAC and apt-X codec support, you will benefit from maximized signal quality when streaming your music wirelessly 40mm Neodymium Dynamic Dome Drivers - Specially designed, powerful drivers deliver deep and powerful bass that perfectly complements today's popular music genres Make and take calls - Enjoy the convenience of hands-free calling thanks to the integrated microphone and Bluetooth profile connectivity. Once your phone is paired, simply press the phone button on the earpiece to accept incoming calls then press again to terminate the call. Music playback will automatically resume once the call is completed. Enjoy long battery life - The built-in rechargeable battery provides up to 20 hours of continuous, wireless music playback. For hands-free calling, you can speak freely for up to 20 hours or up to 200 hours on stand-by. When your battery runs low, passive mode, using the supplied cable, allows for continued listening in a conventional fashion Extended comfort - Lush, wrap around ear cushions provide a comprehensive, acoustic seal-for an intimate listening experience, in long-lasting comfort. And when its time to roll, the swiveling ear cups fold flat for enhanced portability