[Sensitive Sensor] 0.5s response time, non-contact measurement. Measures sound levels in various environments and displays accurate results quickly. [LCD Display] Large backlit LCD screen, easy to read in low-light conditions. Low radiation design. [Precise Measurement] Measuring range: 30–130 dBA; Accuracy: ±1.5 dB; Resolution: 0.1 dB. [Multi-function] Data hold function; Max/Min sound level tracking; Auto power-off after 15 minutes; Alarm triggers at 130 dB. [Power Supply] Powered by a 9V battery (included). Sound Level Meter – Key Specifications Frequency Weighting: A Measuring Range: 30–130 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 × 58 × 35 mm (6.7 × 2.3 × 1.4 in) Weight: Approx. 107 g Power Supply: 9V battery Main Functions • Data Hold • Max / Min Display • 15-minute auto power-off • Large LCD screen Package Includes • 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 exposure limit for 8 hours 90 dB: Loud 100 dB: Very loud 110 dB: Extremely loud 120 dB: Potentially harmful Common Applications • Household appliances • Office environments • Traffic noise • Construction sites • Industrial facilities • Urban environments Measurement Tips 1) When measuring outdoors, use a windscreen to minimize wind interference. 2) Ensure the target sound source is dominant—minimize background noise. 3) Take multiple readings for consistent results. Important Notes 1) Remove the 9V battery if the device will not be used for an extended period. 2) Avoid use in extreme temperature or high-humidity conditions.