1Light weight, compact design structure, easier to carry, and onsite operation. 2Ergonomic design and user-friendliness make it a good tool for monitoring noise levels. 3Dustproof, dropproof, wearresistant, durable, and can be used for a long time. 4Digital miniature sound level meter, which can convert environmental sound into electrical signals, process the data and display the results on the digital display. 5LCD screen, high resolution, clear and accurate reading, to ensure error-free measurement. Item Type: Noise Detector Material: ABS Frequency Range: 31.5Hz~8kHz Measuring Range: 30dB~130dB Resolution: 0.1dB Response Time: Less Than 1 Second. Time Weighting: Quick Response (125ms) Accuracy: 1.5dB (Under 1kHz, 94dB Conditions) Battery Model: 1x6F22 (Battery Not Included) Battery Voltage: 9V Purpose: It can be used for decibel monitoring of noise. 1 x Noise Detector (Battery Not Included)