?? The sound level meter is an instrument for the measurement of ambient sound level. It has been designed to meet the requirements of noise engineers， noise quality control and health prevention in various environments，， such as noise measurement in factory， office， traffic road， family and other noise measurement applications.

Features:
Sound Level Range: 30dB~130dB.
Analogue bar Graph.
Max value hold function.
Fast/Slow time weighting Selection.
Weighting A/C frequency selection.
Overload indication: OVER / UNDER
Large LCD display for easy readout.
Low battery indication.

Specifications:
Measurement of sound level range: 30dB~130dBA， 35~130dBC
Level accuracy: ± 1.5dB (reference sound pressure standard， 94dB@1KHZ)
Resolution: 0.1dB
Frequency response: 31.5Hz ~8.5KHz
Measuring level: 30~130， 30~80， 50~100， 60~110， 80~130dB
Frequency weighting characteristic: A & C
Time weighting: FAST/SLOW
Sampling rate: 2 times/second
Analogue bar Graph: 1dB/1 bar graph

General Characteristics:
Operating temperature and humidity: 0 - 40℃， 10-80%RH
Power Supply: 1 * 9V/6F22 battery (not included)
Item Weight: about 179g / 6.3oz
Dimensions: 256 * 70 * 35mm
Package Size: 23 * 8.3 * 4.5cm / 9.2 * 3.4 * 1.7in
Package Weight: 325g / 11.8.3oz

Package List:
1 * Digital Sound Level Meter
1 * AC Output Wire
1 * Sponge Ball
1 * English Manual