Extech 407766 Sound Calibrator 94/114dB for 0.5" and 1" Microphones
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<b>[Product Information]</b><br>
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<li>Calibrates and verifies Sound Level Meter operation</li>
<li>For use on Sound Level Meters with 0.5" or 1.0" microphones</li>
<li>Total Harmonic Distortion (THD) <2% at 94dB</li>
<li>Meets IEC standard 60942 1997-11</li>
<li>3 position switch (OFF/94dB/114dB)</li>
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