Reddit reviews OPSMEN M31-MOD1 Sound Amplification Gun Shooting Noise Canceling Hearing Sport Protection Electronic Earmuff Classic Black

(New Version 2018) EARMOR by OPSMEN M31-MOD1 Suppresses sudden noise like gunshot above 82 dBA. Noise reduction rating + NRR22.Provided with electronic restoration of surrounding sound. Electronic volume, on/off switch reminder tone. 3 adjustable electronic restoration level.(Not Include Batteries)Power by 2x AAA batteries. New alkaline batteries provide approx. 350 hours' operation.Headband with three different sizes. (Head circumference perimeter S: smaller 21", M:21"-23.5", L: bigger 23.5"). Foldable ear cup design. Pronunciation ergonomic design more fitting ear.An anti-sweat, comfortable ear cup for continued wearing. Waterproof in accordance with IPX-5. Tested and approved in accordance with CE / RoSH / ANSI S3.19-1974 Standards.