Sony MDRXB650BT/B Extra Bass Bluetooth Headphones, Black Connect and stream music easily with Bluetooth and NFC.Connectivity Technology: Wireless Feel the powerful, clear sound of EXTRA BASS. Impedance is 24 ohms Keep the music pumping with up to 30 hours of battery life Listen in comfort and style with cushioned ear pads Enjoy hands-free calls with a built-in mic NOTE: Refer the User Guide before use.