[Sensitive Sensor] 0.5s response time, contactless measurement. Quickly displays accurate noise level readings under various conditions. [LCD Display] Large backlit LCD screen for clear visibility in low light. Low radiation design helps reduce eye strain. [Precise Measurement] Measures sound levels from 30 to 130 dBA with an accuracy of ±1.5 dB and a resolution of 0.1 dB. [Multifunctional Features] Includes data hold function, max/min sound level tracking, and 15-minute automatic power-off. Alarm activates when sound reaches 130 dB. [Power Supply] Operates on a 9V battery (included). Product: Sound Level Meter Main Parameters: - Frequency Weighting: A - Measuring Range: 30 dB to 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 mm (L) x 58 mm (W) x 35 mm (H) (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 Hearing Safety Information: Government research indicates that prolonged exposure to noise levels above 85 decibels may lead to hearing damage. Reference Sound Levels: - 20 dB: Very quiet - 40 dB: Quiet - 60 dB: Moderate - 85 dB: Recommended exposure limit (8 hours) - 90 dB: Loud - 100 dB: Very loud - 110 dB: Extremely loud - 120 dB: Potentially dangerous Applications: Ideal for both industrial and household use. Accurately measures noise from household appliances, pets, urban construction, traffic, offices, factories, and musical instruments. Measurement Tips: 1) When measuring outdoors, use a windscreen to minimize wind interference. 2) Ensure the target sound source is the primary input; avoid interference from other noises. 3) Take multiple measurements to obtain a stable and representative reading. Important Notes: 1) Remove the 9V battery if the device will not be used for an extended period. 2) Avoid using the device in environments with high temperature or humidity.