Audio-Technica ATH-M30 Professional Monitor Headphones are closed-back dynamic stereo headphones that deliver exceptional clarity. The ATH-M30 headphones have 40mm drivers with neodymium magnets and CCAW voice coils. Insulated earcups provide superior isolation while the adjustable cushioned headband keeps your head in comfort. 11' ultra-flexible litz wire cable. Gold-plated stereo 1/8" connector with strain-relief spring and professional screw-on 1/4" adapter. Audio-Technica ATH-M30 Professional Monitor Headphones give you 20-20,000Hz frequency response.