♫ IMPRESSIVE SOUND QUALITY: The 40mm drivers together with the advanced digital audio processing chips offer immersive Hi-Fi stereo sound. Crisp highs and deep lows join multiple hook-up options for Android/IOS devices, MP3/4 Player, laptop PC and gaming devices. ♫ PASSIVE NOISE CANCELLATION: The Passive Noise Isolation headphones work greatly for high frequency noise as well as burst noise (about 15-20dB reduction); Not like Active Noise Cancellation (ANC) headphones, it won't damage the sound at all. ♫ BUILT TO STAY COMFORTABLE: Super lightweight without any heavy feel; Soft memorable leather ear muffs simulate human skin texture ensuring lasting comfort; Adjustable padded headband suits different head shapes.