[Sensitive Sensor] 0.5s response time, contactless measurement. Accurately measures noise levels in various conditions and quickly displays precise results. [LCD Display] Large backlit LCD screen for easy reading in low light. Low radiation design helps reduce eye strain. [Precise Measurement] Measuring range: 30 to 130 dBA. Accuracy of 1.5 dB with a resolution of 0.1 dB. [Multifunctional Features] Includes data hold function, max/min sound level measurement, and 15-minute automatic power-off. Alarm alerts when sound reaches 130 dB. [Power Supply] Operates on a 9V battery (included). Sound Level Meter Main Specifications Frequency Weighting: A Measuring Range: 30 dB 130 dB Accuracy: 1.5 dB Resolution: 0.1 dBA Response Time: 0.5 seconds Operating Temperature: 0 C to 40 C (32 F to 104 F) Operating Humidity: 10% to 90% RH Storage Temperature: -10 C to 60 C (14 F to 140 F) Storage Humidity: 10% to 70% RH Dimensions: Approx. 170 (L) x 58 (W) x 35 (H) mm (6.7 x 2.3 x 1.4 inches) Weight: Approx. 107 g Power Supply: 9V battery Main Functions - Data Hold - Max / Min Display - 15-Minute Auto Power-Off - Large LCD Screen Package Contents 1 x Digital Sound Level Meter 1 x 9V Battery Noise Level Reference Government research indicates that prolonged exposure to noise above 85 decibels may lead to hearing damage. 20 dB: Very quiet 40 dB: Quiet 60 dB: Moderate 85 dB: Exposure limit for extended periods 90 dB: Loud 100 dB: Very loud 110 dB: Extremely loud 120 dB: Potentially harmful Applications Ideal for measuring noise from household appliances, pets, urban construction, traffic, offices, factories, and musical instruments. Suitable for both home and industrial use. Measurement Tips 1) When measuring outdoors, use a windscreen to minimize wind interference. 2) Ensure minimal interference from other sound sources when measuring specific noises. 3) Take multiple measurements to obtain stable and reliable readings. Important Notes 1) Remove the 9V battery if the device is not used for extended periods. 2) Avoid using the device in high temperature or high humidity environments.