[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 activates 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 Safety information: Government guidelines suggest that prolonged exposure to noise above 85 dB may affect hearing health. Typical sound levels: 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: Ideal for home, office, industrial, and environmental use. Suitable for measuring noise from household appliances, urban traffic, construction sites, offices, factories, and more. Measurement tips: 1) When used outdoors, attach a windscreen to minimize wind interference. 2) For accurate measurements, minimize influence from background or unrelated sound sources. 3) Take multiple readings to ensure consistency. 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 environments.