Quick Overview The black version of the Sony MDRXB450 Extra Bass Headphones With In-Line Microphone Remote Control are designed for listening enthusiasts who love the low end found in club, bass, and hip hop music among others. The headphones use supra-aural closed-back 30mm neodymium dynamic dome drivers and aluminum acoustically bass boosting earcups to deliver a frequency response of 5 to 22,000 Hz into a 24 ohm load with a sensitivity of 102 dB/mW. The rugged Y-design cable helps reduce tangles and includes a universal smartphone inline remote control with an omnidirectional electret condenser microphone for making calls and navigating music or podcasts on your mobile device. The functionality of the remote control can be customized using the SmartKey App (available from the Google Play and Android store). The headphones feature a Direct-Vibe structure and pressure-relieving urethane foam earpads for noise isolation, an adjustable headband, and swivel-fold cups for improved portability when placed in a bag. The cable terminates in a gold-plated L-shaped mini plug for connecting to your device.