ACTIVE MICROPHONES - for communication and awareness. 3M sound level-dependent technology provides situational awareness at work while helping protect your hearing: limits sustained loud noises like a saw, suppresses loud impact noises like a nail gun, and aids communication with your equipment in noisy environments NOISE REDUCTION - These ear protectors help reduce noise levels up to 30 Db BLUETOOTH WIRELESS TECHNOLOGY - for calls and music DURABLE BUILT-IN MICROPHONES - help prevent damage and reduce wind noise
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