Check the listing for details. Mini Sound Level Meter Noise Tester 30-130dB Data Hold Fast & Slow Sampling. Condition: New. Listed at 21.00 USD. UT353 is a mini sound meter which can convert ambient sound into electrical signals, process data and displays results on LCD. It does not have traditional meter issues such as meter being too large, complex operation, and so on. UT353 can constantly monitor ambient sound. It is light weight, compact, ergonomic, and user friendly, making it a great tool for monitoring noise levels in hotels, conference halls, home theater, hospitals, and any other noise sensitive environments. FunctionsRangeResolutionAccuracyNoise（A Weighting）30-130dB0.1dB±1.5dBSampling RateFASH 125msSLOW 1000msOverload Indication OLMAX/MIN MAX/MINData Hold HOLDLCD Backlight YesAuto Power Off 5minLow Battery Indication 3.0-3.5VBattery 4.5VCurrent ConsumptionWorkingmA≤40mAPower offuA≤10uAWorking EnvironmentTemperature 0-40CHumidity ≤80%RHStorage EnvironmentTemperature -20-60CHumidity ≤75%RHKey FunctionsON/OFF Short press to turn on/off the meterMAX/MINShort press to switch between MAX/MIN/normal measurement stateFAST/SLOWShort press to select fast sampling (125ms) or slow sampling (1s)HOLD/BLShort press to enter data hold mode, long press to turn on/off backlight Battery is not included in the package. Note: we'll ship this item via Epacket to US, the delivery time is about 3 weeks; For other countries, we'll ship it via registered air mail of Post, usually the delivery time is about 40days. If you want express mail service, please contact us for extra postage in advance.