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pro-ears pro-ears tm silencio dimension gold series electronic muffs latest ... normal sounds through while compressing dangerous noise to a safe level lightweight ... hearing on the range or in the field dynamic level sound compression dlsc technology ... compresses loud noises to a safe 70 db level in less than 1.5 milliseconds ... volume controls in each ear cup provide directional stereo sound and eliminate wires that ... snag or break volume controls offer 50 db gain to let you amplify low-level ... compromising protection from hearing damaging noise an advance over earlier dimension ... you when the batteries reach 50 and 90 discharge levels auto shutoff circuit prevents ... accidental battery drain by cutting power after 4 hours of ...