Feature: 1. Color LCD display screen with backlight makes the data reading clearer and more convenient. 2. Support for overrange indication, support for data hold and automatic power off function. 3. The measuring range is 35dB-135dB, high in accuracy and fast in response, durable for long time use. 4. Can be widely used in home and industrial purposes, living room noise, corporate noise and on-site noise measurement. 5. Wide frequency range, the operation is simple and convenient, light weight, small size and practical to use. Specification: Condition: 100% Brand New 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) Operating Conditions -20℃~60℃/-4℉~140℉, 10%RH~90%RH Storage Conditions -20℃~60℃/-4℉~140℉, 10%RH~75%RH Product Size Approx. 144 x 56 x 30.5 mm / 5.7 x 2.2 x 1.2 in Weight Approx. 116g / 4.1oz . Package List: 1 x Sound Level Meter (Battery Not Included)1 x English User Manual