Type: Closed-back dynamic</br>Driver Diameter: 40 mm</br>Frequency Response: 30 - 20,000 Hz</br>Maximum Input Power: 500 mW at 1 kHz</br></br>Product Description</br></br>The Audio Technica ATHM10 Professional Monitor Headphones deliver exceptional clarity, comfortable lightweight design and a natural frequency response ideal for professional mixing and monitoring. The ATHM10 headphones’ closed-back padded circumaural (around-the-ear) ear cups provide acoustic isolation and long-wearing comfort.</br><br/>http://www.amazon.com/gp/product/B005996B50