Sennheiser PXC150 Active Noise Cancelling Headphone (Discontinued by Manufacturer) Closed supra-aural stereo mini headphones with switchable NoiseGard active noise cancelling Ideal for air travel and noisy environments Ultra-lightweight design and soft ring ear pads Excellent sound quality with deep powereful bass performance Supplied with two adaptors (1/4" stereo jack and 3.5 mm double mono jack) Connectivity technology : Wired