New in box Earmor OPSMEN M31 MOD1 Electronic Hearing Protector in coyote brown. The Tactical Earmor Hearing Protection Ear-Muff designed for noise that can cause permanent hearing loss which cannot be recovered. Noise levels above 125 decibels for even short periods of time, can cause permanent hearing loss. Hearing loss and damage occur from a combination of how long you are exposed to noise and how loud the noise is (dB level). Not only they can compress harmful noises up to 82 dBA without dampening all the sounds in the environment they are also comfortable to use over long periods. Direct mount to tactical helmet. Powered by 2x AAA batteries they can last up to 350 hours, lets not forget they are also water proof in accordance with IPX-5!