LONN Portable LCD Display Digital Sound Level Meter Noise Meter Noisemeter Noise Measuring Meter dB Decibel Logger Tester SL4200

i.Safety Information Please read the following safety information before operating the meter. Environment Condition: 1.Altitude up to 2000 meters 2.Relative humidity 75% max 3.Operation temperature from 0 - 40℃ Maintenance and Cleaning 1.Repairs or calibrations what is not covered in the manual shouldbe performed by professional person only. 2.Periodically wipe the case with a dry cloth.Do not use abrasives or solvents on this instrument. ii.Specification Frequency range: 31.5Hz - 8KHz Measuring range: (30)32dB - 130dB Frequency Weighting: A/C Microphone: 1/2 inch polarization capacitance microphone Digital Display: 4digit LCD Resolution:0.5dB Display Update: 2 times/sec Time Weighting: FAST 125ms SLOW 1 second Measuring ranges: Range 1: (30)32dB - 70dB Range 2: 60dB -100dB Range 3: 90dB - 130dB Accuracy: ±2dB(reference conditions 94dB@1kHz) Dynamic range: 40dB Overflow indicator: "OVER" will be displayed when over range, display "OL" when overflow the upper range more than 5dB. "UNDER" will be displayed when under range, display "LO" when under the lower range more than 5dB or under 30dB. MAX hold: MAX Power: One 9V battery Battery Life: Approximately 110 hours Operation Environment: 0 - 40°C(32 - 104°F) 10 -75%RH Storage Environment: -10 -50°C(14 - 122°F) 10 -80%RH Dimensions: 185(L)*65(W)*35(H)mm Weight: 150g(including battery) Accessories: 9V battery, instruction manual Please note that because of transportation restrictions,our products may not distribute the battery!