PRODUCT OVERVIEW:Feel the freedom and love the bass with these Bluetooth1 headphones with EXTRA BASS that deliver powerful, clear sound and up to 18 hours of battery life3. Find the perfect sound for each song with the Sony Headphones Connect app2, while you enjoy a broad frequency response for the ultimate listening experience. Even take hands-free calls with the built-in mic. Freedom has never sounded better.KEY FEATURES:Feel the power of EXTRA BASS. Connectivity Technology: Wireless-BluetoothHigh-quality wireless audio with Bluetooth and NFCOptimize your sound settings with the Sony Headphones Connect appEnjoy broad frequency response. 18 hours of battery life; Charge Time: Approx. 4 hoursEasily take calls wirelessly with the built-in mic