Extech 407744-NIST Sound Level Meter, 94dB, 1kHz max

The FLIR Sound Level Calibrator is a professional tool designed to calibrate and verify the operation of Sound Level Meters with 0.5" or 1.0" microphones. It generates a 1kHz sine wave at 94dB to an accuracy of 5%, meeting IEC standard 60942 1997-11.

Battery test position with battery status LED for easy monitoring
Durable die-cast aluminum housing for long-lasting use