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GAIN EXPRESS Decibel Meter Digital Sound Level Meter Professional LCD Sound Noise Meter with 30dB to 130dB A/C Frequency Weighting, for Indoor and Outdoor Measurement: Amazon.com: Industrial & Scientific
Amazon.com: Decibel Meter, Votery Portable Sound Level Meter Digital SPL Meter 30dB to 130dB Noise Meter with Backlight A/C Weighted for Home Factories : Industrial & Scientific
