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 Achieve peace and quiet with these noise-canceling headphones from Pyle. The PHPNC45 reduces background noise in any environment. They're ideal for use while traveling - on planes, trains, and buses alike. The closed-style headphone forms a seal around your ear as a first wave against noise - then, if you choose, turn on the active noise canceling technology to further reduce outside ambient noises up to 20 dB. The 40mm drivers provide massive bass, clear mids, and tight highs. And when you're not using them, store them in the included hard carry case. Requires 2 x AAA batteries.