Wireless freedom, sleek comfort, and unmistakable bass response add-up to an unforgettable audio experience. Connect via Bluetooth® with NFC and let your music loose for up to 20 hours (battery life2) anytime anywhere. 40 mm drivers with electronic bass boost will add punch to your favorite tracks. 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. For the ultimate wireless audio streaming experience, aptX® & AAC codec support ensure maximum signal quality, or listen to your favorite playlist conventionally, in passive mode, without relying on the battery. Buy this Headphone and you can Save 20% Off the Sony XB (Extra Bass) wireless headphones in black for just $158! Free shipping!