http://www.amazon.in/Audio-Technica-ATH-T200-Headphone-Black/dp/B0093GXOCI/ Description of the product 3.5 millimeter gold plated L-shaped stereo mini plug Frequency response of 20-20,000 hertz Output sound of 100 decibels per megawatts Maximum input power of 500 megawatts Impedance of 40 ohms