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Easy, Durable Noise Level Detection The 3M™ Noise Indicator NI-100 alerts users to potentially dangerous noise levels, helping identify areas where hearing protection may need to be worn.
• One of the most affordable options available for monitoring noise levels, with a durable, small, lightweight design. • Easy to use. Simply clip the Noise Indicator to a shirt or jacket. To turn on, press and hold button until double green/red light flashes. • Rechargeable battery that operates for up to 200 hours between charges.
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