Denon AH-C551K In-Ear Isolating Headphone in Black AHC551K *FREE SHIPPING* Canal-type design, to bring the music directly into your ear Acoustic optimizer characteristics are achieved by adjusting the sound pressure balance in front of and behind the diaphragm Machined aluminum housing is used for optimum sound quality and strength Canal-type inner ear headphones reduce ambient noise and lets you enjoy the music more Tangle-resistant cable is also easy to store Denon AH-C551 Technical Specifications Type: Dynamic Drive Drive Units: 11 mm Neodymium Magnet Input impedance: 16 O/ohms Sensitivity: 104 dB/mW Maximum input: 250 mW Frequency response: 15 - 24,000 Hz Weight: 5.4 g (not including cable) Cable length: 0.5 m Y type OFC cable