Class 1 acoustic calibrator with 1 in opening and output of 94 or 114 dB re 20 uPa at 251.2 or 1000 Hz. Includes adapters for 1, 1/2, & 1/4 inch microphones, CCS064 case and calibration certificate.
For more information see https://www.larsondavis.com/Products/Calibrators