Closed supra-aural mini collapsible system selectable noisegard reduces unwanted noise by up to 70% ideal for air travel & noisy environments ultra-lightweight design & soft-ring ear pads duofol diaphragms with spiral embossing deliver transparent & lifelike audio deep powerful bass imp: 300? nominal freq resp: 15 hz 21 mhz spl: 104 db @ 1 khz 1 vrms thd: dynamic transducer 1.8 m dual-sided ofc copper cable with 3.5mm plug includes one 6.3mm stereo adapter & one 3.5mm double mono adapter for in-flight entertainment systems includes drawstring carrying pouch 2-year warranty water resistant