Hear normal speech at the push of a button
No need to remove your hearing protection to have a conversation. These earmuffs provide the protection you expect, but let you hear normal speech (at or below a safe 87 dB level) at the push of a button. Pressing the button activates an electronic filter that rebroadcasts speech frequencies inside the muffs at a safe level. Returns to full noise protection after 30 seconds or by pushing the button again. NRR of 26 dB. Requires one "AA" battery (included). Imported.
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2016 Master Catalog: Page 55