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UOM:EachDescription:* Optime III is a super-muff, and has been developed for use in extremely noisy environments.* The protection is based on a technology with a double casing that minimises resonance in the holder casing. This results in maximum high-frequency muffling, while at the same time its still easy to understand speech and signals.* An acoustic connection between the inner volume and the volume between the casings in its turn provides maximum low-frequency ...