This OPSMEN M32 Hearing Protection Headset With Standard Plug can suppresses sudden noise like gunshot above 82 dBA .Noise reduction rating + NRR22. It provided with electronic restoration of surrounding sound. Electronic volume, on and off switch reminder tone. 3 adjustable electronic restoration level. Its headband with three different sizes. (Head circumference perimeter S: smaller than 21", M: 21"-23.5? L: bigger than 23.5") Foldable ear cup design. Pronunciation ergonomic design more fitting ear. Detachable microphone for both left or right handed assembly. 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. Built-in NATO Military Standard 7.0 Plug for PTT. Power by 2x AAA batteries(Not Included) , New alkaline batteries provide approx 350 hours' operation.
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