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Impulse Earmuffs filter out industrial noise while amplifying voices
The Impulse Earmuffs are made specifically for continuous-noise environments. These earmuffs have a NRR of 25dB to suppress sounds exceeding 82 dB, yet improve your ability to hear normal speech around you. Each muff has its own microphone and volume control to amplify weaker sounds. Two "AAA" batteries provide 175 hrs. of use under normal circumstances and have an auto shut-off feature that turns the headset off after four hrs. of continuous use. 3.5mm listen-only audio jack included. Imported.See all Hearing Protection Supplies
2016 Master Catalog: Page 53