7 Range Sound Level Audio Noise Meter Decible DB New with Analog Display Measurment DB

This is a Brand New Sound Level Pressure Meter which is useful for measuring sound intensity, determining speaker efficency or developing quick frequency response plots for loudspeakers. 
Power is supplied by a 9-volt battery, so the meter is completely portable.
To create quick frequency response plots, use an Audio Test CD and read the sound pressure directly from the meter. You can search for a free Audio Test CD on the Interner. 

For more detailed plots, you can use a wide variety of commerical and free software.  You can also search for  a Free Frequency Response Plotter Software with built in corrections for the meter on the Internet.
For more accurate results while testing loudspeakers, it is best to do the measurements outdoors in a quiet and spacious area.

Seven sound-level ranges:allow measurements from 50---126 DB.
A and C weightings:lets you check compliance with safety regulations as well as make acoustic analysis.
Slow and fast response settings:let you check peak and 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 dB: 50 TO 66 dB
70 dB: 60 TO 76 dB
80 dB: 70 to 86 dB
90 dB: 80 to 96 dB
100 dB: 90 to 106 dB
110 dB: 100 to 116 dB
120 dB: 110 to 126 dB
Accuracy: +/- 2 dB @ 114 dB
Standard: 0 dB = 0.0002 u bar
Signal Output: 1.0 volt (peak) minimum into open circuit,with full
scale meter deflection at 1 kHz
Load Impedance: 10 kOhms minimum
Distortion: Less than 2% at 1 kHz, 0.5-volt
Microphone: Electric condenser; omnidirectional
Size (HWD): 6-5/16 x 2-7/16 x 1-3/4 Inches (160 x 62 x 44 mm)
Weight: 6.6 oz (about 185 grams)

Specification:
Switch Setting Range
60dB 50-66dB
70dB 60-76dB
80dB 70-86dB
90dB 80-96dB
100dB 90-106dB
110dB 100-116dB
120dB 110-126dB

Accuracy ..........±2dB@114dB
Standard ..........0 dB = 0.0002μbar
Weighting..........A and C
Response...........Fast and slow
Signal Output......1.0 volt(peak) minimum into open circuit, with full-scale meter deflection at 1 kHz
Load Impedance.....10 kohm minimum
Distortion ........Less than 2%at 1 kHz 0.5-Volt
Microphone.........Electret condenser omnidirectinal becoming slightly directional with increase in frequency
Battery............One 9-volt rectangual type supplied

Package dimension: 176 x 68 x 45mm
Package weight: 186g