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Decibel Meter Langkou Wall Hanging Sound Level Meter 30-130dB Range 11 inch Large LED Display Noise Time Temperature Humidity Meter Wide Applications for Home, Studio, Factory, Classroom Noise Monitor: Amazon.com: Industrial &
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SLM25TK Sound Level Meter with Data Logging Function Measure 30dB~130dB and CD Software - Tekcoplus Ltd.
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