A sound level meter is used for acoustic measurements. It is commonly a hand-held instrument with a microphone. The diaphragm of the microphone responds to changes in air pressure caused by sound waves. That is why the instrument is sometimes referred to as a Sound Pressure Level Meter
FEATURES
Compact and lightweight, come with a portable carrying case, convenient to take it out for testing
Frequency range: 31.5Hz to5KHz, Accuracy: among 1.5dB,Sample rate: 2 times/second