3M Peltor SV Tactical Pro Hearing Protector http://www.amazon.com/gp/product/B0006968YM?tag=sukses2015-20 Noise Reduction Rating of 26 dB Electronics limit amplified sounds to 82 dBA within 2 milliseconds Active-volume provides maximum distortion free amplification low level sounds up to 18 dBA Omni-directional stereo microphones provide 360-degree external ambient listening Auto power-saving feature
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