Designed for the sounds of today Standard headphones with 40mm liquid crystal polymer film diaphragm & 4 Hz-80k Hz HD driver units Developed in a unique partnership with Sony Music Entertainment Hear rich powerful lows & extended highs Closed-back design for exceptional bass response Closed Type Yes Dynamic Type Yes Circum Aural Type Yes Capacity (m W) 1500m W Driver unit (mm) 40mm (HD driver unit) dome type Diaphragm Liquid Crystal Polymer Film Diaphragm Frequency Response (Hz) 4-80000 Hz Sensitivity (d B/m W) 105d B/m W Magnet Neodymium Impedance (Ohm) 48 Ω at 1 k Hz Volume control Yes (only for iPhone iPod iPad) Cord type PCOCC Cord length (m) 1.2m Plug Four-conductor gold-plated stereo mini plug for iPod/iPhone/iPad Usage Time N/A Charge Time N/A Weight (g) 240g Microphone Unit of Microphone In-line remote & microphone cord for iPod/iPhone/iPad Direction of Microphone Omni Direction Design & Sound Features LCP Diaphragm Yes Comfortable Enclosing Design Yes Silent Joints Yes Beat Response Control Yes Enfolding Structure Yes Inward Axis Structure Yes Silent Joints Yes Tangle-free Serrated Cord Yes S-Master / Digital Sound Enhancer No