1、With measuring level range of 30dB to 130dB and 0.1dB resolution, the data will update every 0.5 second, provides you with the real time and accurate sound level data. 2、Equipped with a backlight LCD screen, clearly show you the data even in dark environment. 3、Also can be used as a thermometer, whose measurement range is 0 to 60 Degree Celsius/32 to 140 Fahrenheit. 4、Maximum/min data memory function, you can view the maximum and minimum values of historical measurement, not worrying forgetting the number. 5、Power saving, the sound level meter automatically turn off after 15 minutes without operation, saving energy. 6、Portable for carry, small and lightweight, can be easily put into pocket, convenient for outdoor measurement. 1 x Sound Level Meter (Battery Not Included)1 x Instruction Manual Item Type: Sound Level MeterMaterial: ABSColor: BlackWeight: Approx. 182g / 6.4ozModel: KD850Temperature Measurement Range:0-60 Degree Celsius(32-140 Fahrenheit)Measuring Level Range: 35dB to 135dBAccuracy: 2.0dBFrequency Range: 31.5Hz to 8KHzDynamic Range: 50dBResolution: 0.1dBData Update Frequency: 0.5 secondOperating temp range: -20 to 60 Degree Celsius, 10%RH to 90%RHStorage Temp Range: -10 to 45 Degree Celsius, 10%RH to 75%RHBattery:3 x AAA battery(not included)