Sony MDRXB650BT/L Extra Bass Bluetooth Headphones, Blue;

Let your music loose with the powerful, clear sound of EXTRA BASS and freedom of Bluetooth connectivity that lets you cut the cord, while pumping it up in style. Never miss a beat with 30mm drivers engineered for today's bass-heavy tracks and up to 30 hours of battery life. Even take hands-free calls. They're ready to hit the streets with bass that hits. Frequency Response: 20 Hz–20,000 Hz; Volume Sensor: Yes