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Decibel Meter, Bluetooth Sound Level Meter with Data Logger and Alarm- Portable Audio Sound Tester Measures Noise Levels from 30~130dBA with ±1.5dB Accuracy Professional Sound Measurement Device: Amazon.com: Industrial & Scientific
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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
