Sony MDR-XB950B1 Extra Bass Wireless-Bluetooth Long-lasting Over-the-Ear Headphones with App Control Feel the freedom and love the bass with these Bluetooth headphones with EXTRA BASS. that deliver powerful, clear sound and up to 18 hours of battery life. Find the perfect sound for each song with the Sony Headphones Connect app , while you enjoy broad frequency response for the ultimate listening experience. Even take hands-free calls with the built-in mic. Freedom has never sounded better. Feel the power of EXTRA BASS. High quality wireless audio with Bluetooth and NFC, plus LDAC Optimize your sound settings with the Sony Headphones Connect app Enjoy broad frequency response Easily take calls wirelessly with the built-in mic Listen longer with up 18 hours of battery life. Item model number: MDRXB950B1B.CE7 Batteries: Lithium Metal batteries required. (included)