Sony MDR-EX71SL Fontopia In-The-Ear Headphones (Black) Frequency response: 6 Hz - 23 kHz Includes earbud holder and carrying case Neodymium magnets for high power and low weight; PET diaphragm extends bass and frequency range Convenient earbud design helps reduce outside noise and generate powerful bass response Soft silicone earbuds are washable, removable, and replaceable; two sizes of earbuds included Convenient earbud design helps reduce outside noise and generate powerful bass response Neodymium magnets for high power and low weight; PET diaphragm extends bass and frequency range Soft silicone earbuds are washable, removable, and replaceable; two sizes of earbuds included Includes earbud holder and carrying case Frequency response: 6 Hz - 23 kHz