Item Type: High Accuracy Decibel Meter Material: ABS Power Source: 1.5V AAA Battery x 3 (Without Battery) Suitable For: Noise Program Quality Control Health Measurement and Ambient Noise Measurement. Basic Parameters: Measure Range: 30-130dBA Degree of Accuracy: 1.5dB Frequency Response: 31.5Hz-8KHz 1Main Application: The decibel meter is a equipment mainly used in noise programs, quality measurement, health dectection, and ambient noise measurement. 2High Configuration: The meter adopts the condenser microphone , which achieves a better effect of receiving sound and measuring sound level. 3High Accuracy: The measuring range of the decibel meter is 30 to 130dBA with stable and reliable performance. This product is a high accuracy noise meter with an accuracy of 1.5 dB. Real time monitoring can give you accurate data on the sound level in the area. 4ABS Material: The decibel meter uses ABS material to make its shell, which is environment friendly, wear resistance, and has a high service span. 5Easy Operation: Once the users open the decibel meter, they are able to use it instantly. It is convenient for people of all ages to manipulate it.1 x Instrument 1 x Manual