Extech 407744-NIST

<p><font color="#FF0000"><strong>NOTE: Product with NIST calibration and certificate (the manufacturer typically adds 5-7 days to the normal lead time) </strong> </font> </p> <p><strong>Includes </strong> </p> <ul> <li>Two 9V batteries </li> <li>Carrying case </li> <li>Screwdriver </li> </ul> <p><strong>Features </strong> </p> <ul><li>Calibrates and verifies Sound Level Meter operation </li> <li>Battery test position with battery status LED indicates if battery is good </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>Durable die-cast,aluminum housing </li> <li>1kHz sine wave at 94dB is generated to an accuracy of 5% (frequency) and ?0.8dB </li> </ul>