1With measuring level range of 35.0dB to 135.0dB and 0.1dB resolution, the data will update every 0.5 second, provides you with the real time and accurate sound level data. 2Equipped with a backlight LCD screen, clearly show you the data even in dark environment. 3Also can be used as a thermometer, whose measurement range is 0 to 60 Degree Celsius/32 to 140 Fahrenheit. 4Maximum/min data memory function, you can view the maximum and minimum values of historical measurement, not worrying forgetting the number. 5Power saving, the sound level meter automatically turn off after 15 minutes without operation, saving energy. 6Portable for carry, small and lightweight, can be easily put into pocket, convenient for outdoor measurement. Item Type: Sound Level Meter Material: ABS Color: Black Weight: Approx. 182g / 6.4oz Model: KD850 Temperature Measurement Range:0-60 Degree Celsius(32-140 Fahrenheit) Measuring Level Range: 35dB to 135dB Accuracy: 2.0dB Frequency Range: 31.5Hz to 8KHz Dynamic Range: 50dB Resolution: 0.1dB Data Update Frequency: 0.5 second Operating temp range: -20 to 60 Degree Celsius, 10%RH to 90%RH Storage Temp Range: -10 to 45 Degree Celsius, 10%RH to 75%RH Battery:3 x AAA battery(not included) 1 x Sound Level Meter (Battery Not Included) 1 x Instruction Manual