Extech 407766 Sound Calibrator, 94/114dB, 1Hz, for 0.5" or 1.0" Microphones, 5% Accuracy, w/NIST

• Calibrates and verifies Sound Level Meter operation
• LED indicator lights up when power is on
• Level position to select 94dB or 114dB
• For use on Sound Level Meters with 0.5" or 1.0" microphones
• Durable die-cast, aluminum housing
• 1kHz sine wave at 94dB/114dB is generated to an accuracy of 5% (frequency) and and ±0.5dB (94dB)/±1.0dB (114dB)

This 1kHz 94/114dB professional sound calibrator is for 0.5 in. or 1 in. microphones. Calibrates and verifies sound level meter operation. Level position switch to select 94dB or 114dB with power on LED indicator light. Durable die-cast aluminum housing generates a 1kHz sine wave at 94dB/114dB to an accuracy of 5% (frequency) and ±0.5dB (94dB)/±1.0dB (114dB). Meets IEC standard 60942 1997-11. Comes complete with two 9V batteries, carrying case and screwdriver. Includes certificate traceable to NIST.