Sound Level Meter Calibrator ND9-B

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