Sound Level Meter Calibrator ND9-A

Product Name: Calibrator  for Sound Level Meter( ND9) It is used for calibrate the sound level meter.   Model A  B    Standard   GB/ T15176, ANSI S1.40 CLASS2, IEC942   Output sound level   94dB   94dB 114dB 114dB   Accuracy 0.5dB 0.3dB  Frequency 1000Hz Design for 1" , 1/ 2" Powser supply 1* 9V 6F22 Battery Dimension 142* 47* 47mm Weight appox, 275g