Features 3 in 1 Convenience: This versatile device combines a noise meter, thermometer, and humidity meter, allowing for comprehensive environmental monitoring in one easy-to-use unit High Precision Measurements: Equipped with intelligent sensors, it offers a measurement range of 30-130dB with ±1.5dB accuracy, ensuring reliable readings for sound, temperature, and humidity Versatile Applications: Ideal for various settings, from classrooms to construction sites, this device assists in monitoring sound levels, enhancing product quality control, and promoting health safety User-Friendly Operation: Featuring adjustable brightness and three detection speed settings, this meter is designed for effortless use, making it suitable for both professionals and casual users Convenient Charging Options: With a built-in 2000mAh lithium battery and a 10ft USB charging cable, you can easily charge the device anywhere, ensuring it's always ready for your testing needs Features: 1、3 in 1 Design: This large screen decibel meter has an LED display screen, adjustable brightn, and is equipped with a decibel meter. This means you will have a noise meter, thermometer, and humidity meter, providing convenience for your work and life. 2、High Accuracy: The sound level meter uses intelligent air semiconductor sensors to test the temperature and humidity values in decibels, it is more sensitive, accurate, and stable. 30？130dB Measurement range with ±1.5dB accuracy, 50Hz~8.5KHz frequency response range, 20？85% humidity range with ±5% accuracy, ？10 ℃~50 ℃ temperature range with ± 5% accuracy. 3、Wide Application: This noise monitor is an excellent tool for checking, monitoring, or controlling and testing any environmental sound level, and can be applied to noise engineering, product quality control, health prevention and treatment, and more. This large LED display can be hung on a wall or placed on a table, making it an ideal noise meter for testing sound levels in classrooms, studios, major transportation arteries, factories, construction sites, homes, offices, and more. 4、Easy to Operate: This intelligent decibel meter widely applicable and the brightn is adjustable. You can also pr the M button to adjust detection speed. There are three gears of fast, medium, and slow. 5、Simple Charging: This decibel meter comes with a built in 2000mAh lithium battery power supply and a 10ft long USB charging cable. You can place it anywhere you want and charge it anytime, anywhere. Specification: Item Type: Sound Level Meter Display: LED Screen Atmospheric Prure: 12.5-15.4PSI Sampling Time: 1.5 Seconds Temperature Range: -10℃~50℃ Storage Temperature: -10℃~60C Relative Humidity: 20%-85% Humidity Range: 20%-85% Charging: 1000 mAh 5V Battery: 1 x 2000mAh rechargeable lithium ion battery, shipped with built in battery. Product Size: 10.6 x 3.5x 1.4in Decibel Unit: dB Package List 1 x Sound Level Meter 1 x User Manual 1 x USB Cable 1 x Installation Sticker 2 x Screw 2 x Wall Plug