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 measures 2. 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 environment 3. 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 use 4. Battery Powered: This decibel meter has a built in 2000mAh rechargeable li battery, charging 2 hours to continuous use for 24 hours 5. Temperature and Humidity Detection: The temperature measurement range is 14-140 (-10-60 ), and the humidity measurement range is 20%-85%. the left and right keys to adjust the screen brightness to the desired setting, convenient and practical 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 environment Specification: Item Type: Decibel Meter Display Type: LCD Display Screen Noise Measurement Range: 30-130dBA Accuracy: 1.5 Frequency Range: 50Hz-8.5kHz Frequency Weighting: A Display Accuracy: 0.1dBA Sampling Time: 1.5 seconds Temperature Measurement Range: 14-140 (-10-60) Humidity Measurement Range: 20%-85% Charging: 1A/2A 5V (USB) Battery: 1 x 2000mAh Rechargeable Li Battery (Built in) How to Use: Take out the product and use it directly. Color: Black Material: plastic Package Contents: 1 x Decibel Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.