Features:
Sound level meter can be used in noise engineering, quality control, health prevention and environmental noise monitoring. Such as: the volume measuring various occasions engineering, schools, hospitals, shopping malls, theaters, offices, road traffic, family, audio and other  applications.

This product is a precision instrument, the measurement accuracy up to ±1.5dB. Compliance with the International Committee of IEC651 TYPE2 and the American National Standards ANSIS1.4 TYPE2.

Specifications:
Measuring range: 30 - 130dB (decibels)
Digital Display: 1.5 inch digital tube
Microphone: 1/2 inch condenser microphone
Accuracy: ±1.5dB (reference sound pressure level, 94dB @ 1kHz)
Frequency response: 31.5Hz-8.5kHz
Measuring range: 30 ~ 130dBA, 30 ~ 130dBC
Power Supply: DC 9V 2A DC power supply
Work environment: 0-40 ℃ (32℉ ~ 104℉), 10-70%RH
Dimensions: 123 x 75 x 27mm
Installation hole size: 96 x 83mm
Display panel: Brown Acrylic 



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What in Package:
1 x   WS844 Digital Noise Meter