3M™ Tactical Hearing Protectors, Tactical 6S Stereo (NRR 19dB): These are the Listening muffs that help protect against harmful noise while amplifying low level sounds. They are a real plus for shooters with less than perfect hearing. Electronics limits amplified sound to 82 dB. Features include easy storage and portability and they are lightweight (8. 8oz). Amplifies low-level sounds up to 19 dB. Stereo microphones enhance sound localization. Independent volume controls are standard on each cup.