Buy Now Extech 407744 94dB Sound Calibrator for 0.5 and 1 Microphones
Battery test position with battery status LED indicates if battery is good === Includes: (1) Vane Sensor with 3.9ft cable; (1) 9V Battery; (1) Protective Rubber Holster; (1) Carrying Case Calibrates and verifies Sound Level Meter operation For use on Sound Level Meters with 0.5" or 1.0" microphones Total Harmonic Distortion (THD) <2% at 94dB Meets IEC standard 60942 1997-11 Battery test position with battery status LED indicates if battery is good
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