1Color LCD display screen with backlight makes the data reading clearer and more convenient. 2Support for overrange indication, support for data hold and automatic power off function. 3The measuring range is 35dB-135dB, high in accuracy and fast in response, durable for long time use. 4Can be widely used in home and industrial purposes, living room noise, corporate noise and on-site noise measurement. 5Wide frequency range, the operation is simple and convenient, light weight, small size and practical to use.Condition: 100% Item Type: Sound Level Meter Material: ABS Applied Standard IEC61672-1 Class 2 Measuring Level Range 35dB-135dB Dynamic Range 50 Decibels Frequency Range 31.5Hz-8KHz Accuracy 2.0 Decibels Frequency Weighting A Frequency Weighting Time Weighting Fast: 125ms Slow: 1s Microphone 1/2in Electret Condenser Microphone High/low Reading Indication DB100DB, LCD Displays ''Hi'' DB100DB, LCD Displays ''LO'' Temperature Range -20~70/ -4~158 Temperature Accuracy 1.5/2.7 Resolution 0.1 Data Update 300 Milliseconds Battery Life More Than 60 Hours Automatic Power Off After 15 minutes of no operation, the meter will automatically turn off Battery 3 x 1.5V AAA Battery (Not Included) Oper