[Sensitive Sensor] 0.5s response time, contactless measurement. Capable of measuring sound levels accurately and quickly under various conditions. [LCD Display] Large backlit LCD screen for clear visibility, especially in low-light environments. Designed with low radiation to help 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. [Multi-Function] Features include data hold, max/min sound level tracking, and automatic power-off after 15 minutes. Includes an alert function when sound levels reach 130 dB. [Power Supply] Operates on a single 9V battery (included). Product Specifications Frequency Weighting: A Measurement 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: Approximately 170 mm (L) x 58 mm (W) x 35 mm (H) (6.7 x 2.3 x 1.4 inches) Weight: Approximately 107 g Power Supply: One 9V battery Main Functions Data Hold Max/Min Display 15-Minute Auto Power-Off Large LCD Display Package Contents 1 x Digital Sound Level Meter 1 x 9V Battery Sound Level Guidance Prolonged exposure to noise levels above 85 decibels may lead to hearing damage. Consider the following reference levels: 20 dB: Very quiet 40 dB: Quiet 60 dB: Moderate 85 dB: Threshold for potential hearing risk with extended exposure 90 dB: Loud 100 dB: Very loud 110 dB: Extremely loud 120 dB: Risk of hearing damage Wide Range of Applications Suitable for both industrial and household use. Ideal for measuring noise from household appliances, pets, urban construction, factories, offices, traffic, and musical instruments. Measurement Tips 1) When measuring outdoors, ensure wind interference is minimized for accurate results. 2) Isolate the target sound source to avoid interference from other noises. 3) Take multiple measurements to obtain a stable and reliable average. 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 extreme temperature or humidity.