Overview: Seven sound-level ranges:allow measurements from 50---126 DB.A & C weightings:lets you check compliance with safety regulations as well as make acoustic analysis. Slow & fast response settings:let you check peak & average noise levels. Builtin battery condition indicator. Phono-type output jack:for connection to home theater or test equipment. Threaded insert:lets you attach the meter to a camera tripod for increased accuracy. 60 d B: 50 TO 66 d B 70 d B: 60 TO 76 d B 80 d B: 70 to 86 d B 90 d B: 80 to 96 d B 100 d B: 90 to 106 d B 110 d B: 100 to 116 d B 120 d B: 110 to 126 d B Accuracy: /- 2 d B @ 114 d B Standard: 0 d B = 0.0002 u bar Signal Output: 1.0 volt (peak) minimum into open circuit, with fullscale meter deflection at 1 k Hz Load Impedance: 10 k Ohms minimum Distortion: Less than 2% at 1 k Hz, 0.5-volt Microphone: Electric condenser; omnidirectional