Sound Clarity Active Noise Canceling Headphones Link Audio technology enhances sound quality, improves speech clarity, filters undesirable sound, and reduces distortion State-of-the-art active noise cancellation to reduce undesirable sounds and background noise Hard shell protective carrying case for travel Use with TV, computers, portable DVD, DC, MP3 of Ipod players and airline audio systems. Dual pin airline adapter, 1/4" stereo adapter