Model # 407744 Store SKU # 1000846375
The 407744 is a 1kHz 94dB professional sound calibrator for 0.5 in. or 1.0 in. microphone calibration which verifies sound level meter operation. Battery test position with battery status LED indicates if battery is good. Durable die-cast aluminum housing generates a 1kHz sine wave at 94dB to an accuracy of 5% (frequency) and 0.5dB (94dB). Meets IEC standard 60942 1997-11 and comes complete with two 9V batteries, carrying case and screwdriver.