Polk Audio UltraFit 1000 In-Ear Sports Headphones with iPod/iPhone Control and Mic (Black/Red) Part: AM1110-A Type: Sport Driver Unit: 14.2mm diameter Frequency Response: 18Hz-23KHz Input Impedance: 16 ohms Sensitivity: 118 dB Cord Length: 14 (35.6 cm) / 41 (104.1 cm) Weight: 0.5 oz. (14 g)