Ruby Electronics DT-8820 4-in-1 Industrial Thermometer Light Humidity Sound Meter
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<b>[Product Information]</b><br>
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<li>4 in 1 as Light meter, Sound Level meter, Relative Humidity meter, Temperature meter.</li>
<li>3 1/2 digit large LCD display with units of Lux, oC, oF, %RH and C & dB, A & dB indication.</li>
<li>Auto power off.</li>
<li>Display: 0 - 1999 count.</li>
<li>Data hold and Maximum hold.</li>
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