[Sensitive Sensor] 0.5s response time, non-contact measurement. Capable of measuring noise levels in various environments and displaying accurate results quickly. [LCD Display] Large backlit LCD display for easy reading in low-light conditions. Low radiation design to reduce eye strain. [Precise Measurement] Measuring range: 30–130 dBA; Accuracy: ±1.5 dB; Resolution: 0.1 dB. [Multi-function] Data hold function; Max/Min sound level measurement; 15-minute auto power-off; Alarm function activates at 130 dB. [Power Supply] Powered by a 9V battery (included). Sound Level Meter – Main Parameters Frequency weighting: A Measuring range: 30 dB–130 dB Accuracy: ±1.5 dB Resolution: 0.1 dBA Response time: 0.5 second Operating temperature: 0–40°C (32–104°F) Operating humidity: 10–90% RH Storage temperature: −10–60°C (14–140°F) Storage humidity: 10–70% RH Dimensions: approx. 170 (L) × 58 (W) × 35 (H) mm (6.7 × 2.3 × 1.4 in) Weight: approx. 107 g Power supply: 9V battery Main Functions Data Hold Function Max/Min Display 15-minute automatic power-off Large LCD screen Package Contents 1 × digital sound level meter 1 × 9V battery Noise Level Reference Guide 20 dB: very quiet 40 dB: quiet 60 dB: moderate 85 dB: recommended daily exposure limit 90 dB: loud 100 dB: very loud 110 dB: extremely loud 120 dB: potentially harmful Applications Suitable for industrial, commercial, and residential use. Measures noise from household appliances, construction sites, traffic, offices, factories, and more. Measurement Tips 1) When measuring outdoors, use a windscreen to minimize wind interference. 2) Ensure the target sound source is dominant; avoid significant background noise. 3) Take multiple measurements to obtain a stable average reading. Notes 1) Remove the 9V battery if the device will not be used for an extended period. 2) Avoid use in high-temperature or high-humidity environments.