Advanced noise-cancelling design offers 85% noise reduction for superior listeningNoise-cancelling can be switched on/off, and is powered by AAA battery for up to 50 hours useDouble housing for sound insulation; foam-cushioned ear pads for comfort and further isolationHeadphones weight just 5.3 ounces, and fold flat to fit in included carrying caseIncludes four-foot detachable cord with airline and 1/4-inch adapters,Type: Active Noise-Cancelling, On-Ear