Driver Unit:dia10mm;Impedance: 16ohm;Sensitivity: 92db (at1KHZ 0.126V);Frequency Range: 20Hz~20KHz; Distortion: less than 5% (1mW1KHz);Max Input Power: 10mW;Cord Length(approx): 4ft (1.2m);Jack: 3.5mm, stereo, nickel –plated.