MESTEK SL620 LCD Digital Audio Decibel Meter 35-135dB Sound Level Meter Noise Level Meter Sound Monitor Noise Measurement Tool

• This audio noise measure tool is great for checking, monitoring or controlling, and testing the sound level of any environments
• It is widely applicable for personal, families, business, studies, industrial and etc
• With the measuring scope from 35dB to135dB 
• Easy to read the data with a large digital screen to know noise levels recorded by the meter
• A great basic sound meter for use across the spectrum in many different fields from music recording, neighbor noise complaints, industrial settings, office settings, speech therapy, etc

Specification:

• Noise measurement range: 35-135dB
• Noise accuracy: 2.0dB (reference sound pressure level, 94dB@1kHz)
• Frequency Response: 31.5Hz-8kHz
• Time testing: F/S switching
• FAST: use 125ms time constant (standard use)
• SLOW: Use a time constant of 1 second (used when there is a large change in hue value)
• Frequency weighting characteristic: A characteristic (A-Weighted)
• Digital display: 4-digit LCD display
• Resolution: 01dB
• Measurement second gear: low level lower than 100dB / high level higher than 100dB
• Data retention: support
• MAX/MIN: support (large and small measurements)
• Ambient temperature measurement: 0-60 Celsius
• Use battery: 1.5V AAA*3 (No.7 battery) (not included)
• Working temperature and humidity: 0-40 Celsius/10%-80%RH
• Storage temperature and humidity: 10-60 Celsius/10-70RH
• Size: 147*59*30mm
• Weight: about 76g