Overview Reviews Product Description Cooperates with the R4700SD & SD-9300 data logging environmental meter as a professional sound level meter. 30 to 130 dB, 3 ranges Frequency weighting networks are designed to meet the IEC 61672 class 2 A weighting networks are conformity to standards Fast Time weighting dynamic characteristic modes Condenser microphone for high accuracy & long-term stability Over/Under indicator Low battery indicator Electric condenser microphone Size of microphone: 1/2" standard size Reed Instruments Catalog R4700SD Datasheet Product Videos Custom Field Product Reviews Write a Review Write a Review × Reed Instruments Sound Level Adapter R4700SD-SOUND Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *