Studio Grade Accuracy -Achieves highest output sensitivity in its class with 102 dB SPL sensitivity at 1 kHz at 0.1 mV -High performance, precision matched, balanced armature drivers Noise Isolation -35 dB - 42 dB noise isolation -Documented highest noise isolation of any earphones or headphones on the market today Features -Precision machined metal bodies with anodized finish -Assortment of noise-isolation eartips ensures proper seal and comfort -CUSTOM•FIT option available -Detachable, 4ft. cable allows for easy replacement