Feature:1. 3 in 1 Decibel Meter: Using acoustic chip and accurate measurement technology, it displays noise, temperature, and humidity in real time on an LCD screen, allowing you to clearly know the noise level and take effective noise reduction measures2. Accurate Measurement: The noise measurement range is 30dB to 130dB, with a measurement accuracy of 1.5dBA and a display accuracy of 0.1dBA. Real time monitoring and providing you with accurate data on sound levels in the environment3. LCD Display: This sound level meter adopts a large size digital LCD screen with backlight, which provides clearer reading effect in dark places Supports desktop placement, takes up less space, and does not require handheld work, more convenient to use4. Battery Powered: This decibel meter has a built in 2000mAh rechargeable li battery, charging 2 hours to ensure continuous use for 24 hours Equipped with a 1.2m Type C charging cable, the indicator light displays red when charging and green when fully charged5. Temperature and Humidity Detection: The temperature measurement range is 14-140 (-10-60 ), and the humidity measurement range is 20 percent -85 percent . Press the left and right keys to adjust the screen brightness to the desired setting, convenient and practical6. Compact and Practical: This decibel meter is small and portable, allowing you to place it anywhere you need, whether it is office, factory workshop, school, or home. It can provide you with intuitive noise data, keeping you in a comfortable living and working environmentSpecification:Item Type: Decibel MeterDisplay Type: LCD Display ScreenNoise Measurement Range: 30-130dBAAccuracy: 1.5 dBAFrequency Range: 50Hz-8.5kHzFrequency Weighting: ADisplay Accuracy: 0.1dBASampling Time: 1.5 secondsTemperature Measurement Range: 14-140 (-10-60)Humidity Measurement Range: 20 percent -85 percent Charging: 1A or 2A 5V (USB)Battery: 1 x 2000mAh Rechargeable Li Battery (Built in).Package List:1 x Decibel Meter1 x User Manual1 x USB Cable