Extech 407744 94dB Sound Calibrator is a 1kHz Professional Calibrator for 0.5" or 1.0" Microphone which is complete with two 9V batteries, carrying case, and screwdriver . Extech 94dB Sound Calibrator also has the following features.
Features:
• 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
• Complete with two 9V batteries, carrying case, and screwdriver
