Acoustic Calibrator

Made for calibrating of Digital Sound Level Meter 330-54382 in compliance with "Good Laboratory Practices"� in the OSHA addendum of acoustical calibration of sound meters. Output of 94 dB at 1000 Hz �5% with �0.5 dB accuracy. Easy to use and portable for use in the field. Comes complete with instructions, two 9V batteries and carry case.