Feature:1. With portable design, anti-drop, anti-skid, and anti-static design, suitable for single hand operating with a comfortable feeling.2. Featuring large LCD display screen, cool and modernized design, simple to operate and easy to read even in the dark.3. It is lightweight, compact, ergonomic, user-friendly and ideal for monitoring noise levels.4. It will automatic shutdown after no operation within 30min to ensure the battery service life and also features data hold, maximum and mumimum data display.5. It is widely used to measure the sound level of rooms, subways, libraries, business centers, offices, homes, etc.6. Analog AC/DC output for connection to frequency analyzer or XY axle recorder.Specification:Condition: 100% NewItem Type: Noise TesterMaterial: ABSApplicable StandardIEC61672-1 2Accuracy1.4dbFrequency Range31.5Hz-8kHzDynamic Range50dbMeasuring RangeLow Frequency: 30dB80dBMiddle Frequency: 50dB100dBHigh Frequency: 80dB130dBAuto Range: 30dB-130dBFrequency WeightingACTime-weightedFast 125ms; Slow(1s)Microphone1/2in Electret Condenser MicrophoneDisplay4digits LCD display, resolution 0.1dBSampling Time2times/sMaximumMaximum DataMinimum HoldMinimum HoldReading HoldAlarm FunctionEnter "OVER" when the input is less than "UNDER".Analog OutputAC/DC output of headphone socket AC = 1Vrms, DC = 10mV / dBAuto Power -OffThe meter will turn off automatically after about 30 minutes. 15 minutes of inactivity.Power Supply9V Battery, 006P or IEC 6F22 or NEDA 1604 (not included)Battery Life 30hOperating Condition -20-60; 10RH-90RHStorage Condition -20-60; 10RH-75RHSize: (LxWxH)252x66x33mm / 9.9x2.6x1.3inWeight1270g / 2.8lb.Package List:1 x Noise Tester1 x Instruction1 x Box1 x Adaptor1 x Screwdriver