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Decibel Meter Wireless Sound Decibel Meter with App Data Logging Bluetooth Portable Sound Level Meter 0~130dB High Accuracy SPL Meter for Classroom, Office, Home and etc.: Amazon.com: Industrial & Scientific
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Wireless Decibel Meter Sound Level Meter Data Logger Bluetooth Sound Decibel Meter with App Data Recording Function 0~130dB High Accuracy Noise Meter for Classroom, Home, Office: Amazon.com: Industrial & Scientific
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