Pyle Home PHPNC45 High-Fidelity Noise-Canceling Headphones with Carrying Case Reduces Ambient Noise By 95% - Speaker Type: 40mm Mylar - Connects With 3.5mm Stereo Jack Ergonomically Designed For Maximum Comfortable Listening Experience - Cone Impedance: 32ohm - Included Accessories: Detachable Audio Cable, 1/4-Inch Stereo-Plug Adapter, Dual-Plug Adapter (For Airplane), Hard Carry Case Up To 20dB Of Noise Cancellation; Effectively Reduces Aircraft Or Subway Engine Noise - Noise Reduced Over Frequencies 70 - 1200 Hz Larger 40mm Driver With Clear Sound And Well Defined Bass - 2 X AAA Batteries Required Frequency Response: 30 - 20000 Hz - Cable Length: Detachable 1.0m