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Re-engineered headband for improved fit and comfort - Low-profile cups for rifle/shotgun shooting - Double recessed microphones for reduction of wind noise - 2-hour auto shut-off - Tethered battery door - 3.5 mm audio input jack- Audio mixing allows listening to input device plus ambient sounds - Featuring proprietary 3M technology that surpresses harmful gunshot noise while amplifying low-level sounds the 3M Peltor Tactical 100 Electronic Hearing Protctor is idea for hunters and indoor and outdoor shooters. Adaptive Frequency Response reduces background noise for clearer conversations and hearing of commands. Plus the Variable Supression Time feature provides optimal echo reduction in indoor shooting environments. With superior performance enhanced comfort features and improved functionality - including a tethered battery door streamlined design improved noise reduction rating and enhanced electronics - the 3M Peltor Tactical 100 Electronic Hearing Protector combines innovative 3M technology with the trusted Peltor Brand to give shooters and hunters the ultimate hearing protection experience. - Technical Information - NRR (Noise Reduction Rating): 22 - CE Certified: No - Amplification: Not listed by manufacturer - Reaction Time: Not listed by manufacturer - Battery type: 2 AAA (not included) - Weight: 16 oz.