Application: it is used to calibrate the sound level meters.
Model: SL5818
Standard: IEC651 Type2, ANSIS1.4Type2
Function: SL  LEQ
Measuring: A .40-125dB  C. 40-125dB  Line. 40-125dB
Filter
Detection characteristics: fast/slow
DC output: 10mv=1dB
Resolution:0.1dB
Accuracy: 1dB
Display: LCD display
Power supply: 4x1.5V AA (UM-3) battery
Battery indicator: low battery indicator
Dimensions: 210x69x32mm
Weight (not including probe): 175g