Forget the noisy part of traveling. The AKG K402 turns every trip by plane, train, or bus into a relaxed listening session. An integrated active noise reduction filter reduces noise-related stress to a minimum: for fatigue-free, restful traveling. The AKG K402 provides excellent comfort and, thanks to the unique 3D-Axis folding mechanism, takes up almost no space in your traveling bag. Features Active noise reduction Excellent hi-fi sound Electronic noise filter for optimum ambient-noise attenuation Unique 3D-Axis mechanism: headphones fold down quickly and easily The ideal headphones for travelling by air, rail, or bus Complete with carrying bag, airplane and stereo adapters Specifications Frequency range: 12Hz to 28kHz Sensitivity: 125dB Input impedance: 32 Ohms Net weight (without cable): 73g What?s in the box? K414P Graphite Over-Ear Headphones Carrying bag Airplane and stereo adapters