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Triangular Glass Prism diy reflection prisms equilateral prism 50mm x 50mm size
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1A 50/60Hz worldwide range
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UNI-T UT353 30~130dB Noise Measuring Instrument Audio Sound Level Meter, UNI-T UT353 incubator egg Least Count: 01. It adopts miniature capacitive microphone sensor technology and band pass weighting network design; this microphone adopts metal hole design, and the internal double protection can still protect the sound head intact in case of accidental drop, so that you can use it with confidence 2. Can be widely used in noise engineering, quality control, health prevention and other environmental noise measurement, such as factories, traffic roads, home audio
