Features Next generation 2003 N.U.D.E EX Fontopia earphones. (successor of Sony's popular MDR-EX70SL Fontopia earphones) Fontopia Headphones in-the-ear design fits snugly yet comfortably inside the ear; eliminates the headband so you can enjoy music while exercising skating or dancing Closed-type Fontopia design reduces outside noise for high-intensity listening; helps generate powerful resonant bass response New super-small 9 mm drivers are a key enabling technology; ultra-compact drivers produce powerful sound with space left over for the sonic isolation of Sony's silicon earbuds Soft silicon earbuds reduce outside noise provide long-lasting comfort hour after hour; the earbuds are washable removable and replaceable Three sizes of earbuds (S/M/L) accommodate a full range of ears Oxygen-Free Copper (OFC) cord for high signal transmission low noise Stylish Neck-Chain Cord Gold-plated mini-plug for exceptional corrosion resistance superb conductivity low noise Streamlined compact case neatly stores the ear-buds and headphone cord when not in use; vivid purple styling; high-impact case is ideal for carrying in a pocket or backpack New case design minimizes cord tangles; partial winding can shorten the effective cord length during use Specifications Type: Lateral In-the-ear Closed Dynamic Driver Unit: Aperture 9mm (CCAW voice coil adoption) Cord: OFC; Neck Chain 0.5m (remote friendly) Plug: Gold-plated Stereo straight Mini Plug Impedance: 16 ohms at 1 kHz Sensitivity: 100 dB/mW Power handling capacity: 100mW Frequency Response: 6 - 23 000Hz