Sony MDRXB450APB BLACK Extra Bass Headphones Features Feel the pulse of the club with the XB450AP Extra Bass Headphones. The powerful Beat Response Control enhances low frequency sounds and the cushioned earpads let you to listen longer in total comfort. Make hands-free calls with the AP remote and add style with aluminium accents. Beat Response control creates rich lows Swivel folding-style for listening on the go Fixed two-sided cord with AP remote for hands-free calls Aluminium housing adds durability and style Cushioned earpads for long-wearing comfort Driver Unit 30mm (Dome Type) Frequency Response (Hz) 5-22,000Hz