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Digital Sound Level Meter 30~130dB A/C Weighting Fast/Slow Adjustable Noise Meter Decibel Detector with Bluetooth Communication - AliExpress
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Amazon.com: Decibel Meter, Tadeto Digital Sound Level Meter Portable SPL Meter 30dB to 130dB MAX Data Hold with LCD Display Backlight A/C Weighted for Home Factories : Industrial & Scientific
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