407740 Datasheet, PDF (1/4 Pages) Extech Instruments Corporation. – Digital Sound Level Meter

User's Guide
Digital Sound Level Meter
Model 407740
Introduction
Congratulations on your purchase of the Extech 407740 Digital Sound Level Meter. This
device measures sound in decibels (dB). Useful features include A/C Weighting,
Fast/Slow Response Time, and Maximum Reading HOLD. Careful use of this meter will
provide years of reliable service.