Active noise cancellation for pure AKG sound quality. AKG K391 NC in-ear headphones turn trouble into a personal concert or screening. Compact and easy to take a trip with, these noise-canceling headphones will certainly make a congested airplane, subway or plaza seem downright tranquil, while providing powerful noise straight to your ears. A premium hard case is consisted of to protect your iPhone or iPod when you're on the go, and an in-line microphone lets you address a call as easily as listening to a song. Lightweight and comfortable, these in-ear headphones deliver the comprehensive, studio-quality noise that AKG engineering has actually provided leading musicians for over 65 years.