Pyle Home PHPNC15 Folding Noise-Canceling Headphones Noise Canceling Feature Reduces Background Nose In Any Environment Ideal for Airplane, Train And Bus Use - Frequency Response: 20~20K Hz, Impedance: 32 Ohms, Sensitivity: 110db  2db/Mw Closed-Style, Dynamic Headphone with 40mm Driver - Cable Length: 1.5m Foldable Headband Allows Phones to Fold Down To A Small Size For Convenient Storage - Plug: 3.5mm Stereo + Dual Mono Adaptor Active Noise Canceling Headphones Reduce Outside Ambient Noise By 83.4% - Power Source: 2 X AAA Batteries Noise Cancellation Can Be Switched On/Of