First off it's advertised as a minimum of 30dB but if you read the manual it clearly says 40dB to 130dB. This meter reads 60 dB in a dead quiet room. When you turn on the backlight, the reading drops by 20 dB. Regardless of the reading, the backlight goes out as soon as it is turned on. Someone bought 2 and put them side by side and they were off by 30dB when measuring the same thing. It's worse than toys.
π VLIKE Digital Audio Decibel Meter: Sound Level Monitor, Noise Measurement 30-130 dB - MAX Data Hold, A/C Mode
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π Handheld Sound Level Meter with LCD Display - Mini Digital Decibel Tester and Alarm (30-130dBA)
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π CAMWAY 6 Inch Digital Caliper with LCD Display, Electronic Vernier Caliper, 150mm Stainless Steel Feeler Gauge, Plastic Digital Caliper Set for Zero Setting Inside/Outside Diameter, Depth, and Step Measurement Tool
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