Powerful Sound Quality is Delivered Through 36mm High Quality Drivers with Neodymium Magnets Stereo HiFi and Airplane Adapters Supplied Swiveling Ear Cups and Fully Foldable Design for Easy Travel Convenience Reduce ambient noise by 15 dB at 200 Hz Enhance Your Audio Entertainment by Reducing Ambient Noise for a Quieter Environment Thickly padded head and ear cushions have a fully fodable design Operates as passive headphone. 9.25" D x 6.5" W x 2" H