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This version of Pyramex earmuffs uses an electronic suppression device that allows normal sounds, ambient noises, and voices through the earmuff, but blocks out harmful noises. This is a must for workers in high noise areas that still need to communicate with one another.
In the neutral position on the sound dial, the earmuff has a NRR rating of 20. Finally, the Pyramex PM4011 earmuff comes in an attractive black color, and adjust to fit most head sizes.
Offers electronic suppression of dangerous impulse noises common to industrial users and shooters.
Amplifies surrounding voices, important signals and warnings
NRR 20db when used in neutral position
3.5 mm jack to connect to MP3
Soft head pad for all day comfort
Foam-filled padded ear cups fit securely and comfortably over the ear
Electronics are designed to limit amplified sound levels to 83db
Batteries not included
Exceeds ANSI S3.19 Requirements
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Pyramex Electronic Earmuff NRR 20