Features 3 in 1 Noise Level Decibel Meter: This advanced sound level meter not only measures noise levels accurately (30dB to 130dB) but also displays real time temperature and humidity on its LCD screen, helping you take effective noise reduction measures. Accurate Measurement: With high accuracy (±1.5 dB) and a display resolution of 0.1 dBA, this decibel meter provides you with accurate data on environmental noise levels, empowering you to make informed decisions. Digital LCD Display: The large backlit LCD screen ensures clear readings even in dark environments, with high display quality, low eye strain, low power consumption, and low radiation. Long Lasting Battery Life: Featuring a built in 1600mAh rechargeable battery, this decibel meter can continuously use for 24 hours on just 2 hours of charging, making it convenient to use on a table without the need for handheld performance. Compact and Exquisite: Compact noise meter allows for easy portability and placement in various settings, from offices to factories, schools, and hospitals. Create a peaceful environment and defend your living and working spaces with noise data. Specification: Item Type: Digital Decibel Meter Material: ABS Display: LCD Display Noise Measurement Range: 30-130dBA Accuracy: ±1.5 dBA Frequency Range: 50Hz-8.5kHz Frequency Weighting: A Display Accuracy: 0.1 dBA Sampling Time: 1.5 seconds Temperature Measurement Range: 14℉-140℉ (-10℃-60℃) Humidity Measurement Range: 20% - 85% Charging Specification: 1A 2A 5V (USB) Battery: 1 x 1600mAh Rechargeable Li Battery (Shipped with Built in Battery) How to Use: Open the packaging and remove the product for immediate use. packing list: 1 x Sound Level Meter 1 x Instruction Manual 1 x USB Cable Package List 1 x Sound Level Meter 1 x Instruction Manual 1 x USB Cable