These headphones feature the award-winning patented "Hear the Difference" technology from LINX AUDIO. They include state-of-the-art active noise cancellation (ANC) to reduce undesirable sounds and background noise, and operate as normal headphones when ANC function is turned off or if batteries run out. SOUND CLARITY's lightweight adjustable headband provides superior fit and full-size ear cups with soft cushions swivel for maximum comfort. The in-line volume control enables easy adjustment to safe listening levels. SOUND CLARITY provides full, rich sound for people with normal hearing and enhanced sound clarity for individuals with mild to moderate hearing loss.