These Sony ZX Series MDRZX110/BLK headphones feature neodymium magnets and 30mm drivers for powerful, reinforced sound. Enjoy your favorite songs with lush bass response thanks to the Acoustic Bass Booster technology. On-ear design With foam ear cushions for comfort during extended listening sessions. Neodymium magnets Offer sound reinforcement. 30mm drivers Deliver powerful audio. Acoustic Bass Booster technology Produces enhanced bass response. Lightweight design Along with swivel capability promotes simple portability. 3.9' tangle-free Y-type cord Makes it easy to achieve a hassle-free connection to your device. 12Hz - 22kHz frequency response For faithful sound reproduction. 98dB/mW sensitivity For powerful sound. 24 ohms impedance To efficiently conduct power. What's Included Sony ZX Series On-Ear Headphones Owner's manual