Extech 407744-NIST Sound Calibrator for 94 dB

• Total Harmonic Distortion (THD) <2 % at 94 dB
• 1 kHz sine wave at 94 dB and 114 dB (model 407766) is generated to an accuracy of 5% (frequency) and ±0.8 dB
• Battery test position with battery status LED indicates if battery is good
• Durable die-cast, aluminum housing
• For use on Sound Level Meters with 0.5" or 1.0" microphones
• Calibrates and verifies Sound Level Meter operation

Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.