Hear everything you need and none of what you don't! These EMaxTM Muffs actually amplify day-to-day sounds to make them easily heard even with the Muffs on. The moment a gun shot is detected, however, all sound is cut out to prevent hearing loss. And this low-profile design makes them even easier to wear and pack than ever before! 2 microphones amplify sounds below 85 decibels, such as normal communication, range commands and environmental sounds. Shuts off sound above 85 decibels for a split second to protect your hearing. True stereo sound allows you to easily identify the directional source of any sound.