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Konnon Digital Noise Meter Wall Mounted Digital Sound Level Meter Decibel Monitoring Tester Noise Volume Measuring Instrument 30-130dB Measuring Range: Amazon.com: Industrial & Scientific
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Amazon.com: Decibel Meter, CURCONSA SPL Meter, Portable Sound Level Meter, 30dB to 130dB, LCD Display, can be Used in Homes, Factories and Streets（Blue） : Industrial & Scientific
