?5 in 1 Decibel Meter?This decibel meter has an 8.6 inch high-definition LCD screen with adjustable brightness and a decibel meter, which means you will have a noise meter+thermometer+hygrometer+clock+time.The A-weighted SPL meter simulates the frequency characteristics of low-intensity human ear noise, which is suitable for the detection of ambient noise. ?High Accuracy Measuring ?The sound level meter measures range from 30 130 dB with an accuracy of 1.5 dB, Frequency from 35 to 8.5KHz,Humidity range: 20~85%,Temperature Range : -10C - 60C (14?-140?) Due to the different environments, the actual measurement value has a deviation of 0~15% which is a normal range. ?Charge-Friendly?Desktop decibel meter built-in 2000mAh lithium battery power supply, comes,Endurance time of 3~5 days, ultra-long standby only need to charge once a week.The decibel meter can be used in many environments and is also suitable for noise engineering, product quality control, health prevention, treatment, etc. ?Easy to Use?Click ""left button"" to enhance the brightness, click ""right button"" to reduce the brightness,Long-press ""M"" to adjust the time.The temperature ( C and F) can be switched.We prefer to use Portable Decibel Meter on the countertop. ?Warm Note?The product is calibrated and tested and sent out, it will consume a certain amount of power,So generally out-of-the-box batteries are in a non-full state.The battery level indicator shows red when charging and green when full.