Frequency response (headphones) 19 - 20000 HzImpedance 16 ?Sound pressure level (SPL) 113 dBJack plug 3.5 mm (angled)Cable length 1.2 mTransducer principle DynamicOffering a powerful, bass-driven stereo sound with greater clarity and improved dynamics are the CX 300-II Precision Black ear-canal phones. The various sizes of ear adapters (S/M/L sizes) provided in the package allow for a personalised fit as well as a high passive attenuation of ambient noise. Also, the asymmetrical cable design ensures a high wearing comfort as you listen on the go.FeaturesHigh-quality dynamic speaker systems for powerful, bass-driven stereo soundExcellent fit in the ear canals and high attenuation of ambient noise (ear adapters in different sizes included)Convenient carrying pouch includedOptimised for MP3, iPod, iPhone, CD players and portable gaming systems (iPod and iPhone are trademarks of Apple Inc. registered in the U.S. and other countries)Asymmetrical cable2-year warrantyDelivery IncludesCX 300-II ear-canal phonesEar adapter set (S/M/L)Carrying pouch