Extech 407744: 94dB Sound Calibrator1kHz Professional Calibrator for 0.5" or 1.0" MicrophonesFeatures:- Calibrates and verifies Sound Level Meter operation
- Battery test position with battery status LED indicates if battery is good
- For use on Sound Level Meters with 0.5" or 1.0" microphones
- Durable die-cast, aluminum housing
- 1kHz sine wave at 94dB is generated to an accuracy of 5% (frequency) and ±0.8dB
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