Check the listing for details. Portable Impulse Sound Level Meter Tester Gauge With Testing Range 30dB~90dB. Condition: New. Listed at 388.00 USD. Portable Impulse Sound Level Meter Tester Gauge With Testing Range 30dB~90dBNote: Battery not Included During The Shipping !!! Spec：The Impulse Sound Level Meter is a universal sound level meter that measures the exponential time weighted sound level, and an impulse sound level meter. Features* Its performance is in accordance with GB/T 3785-2010 standard level 2 And IEC 61672:2013 Class 2 sound level meter requirements. It also meets the JJG 188- 2017 standard. * The three time weighting F, S, and I can be selected. * The digital detection technology is used to replacesome traditional sound level meters, the stability andreliability are greatly improved. * Large screen display is adopted, with clear and intuitive display. With dynamic scale display. SpecificationsMicrophoneΦ12.7mm (1/2') test condenser microphoneFrequency weightingA, C, and Lin(Linear)Range25dB~130dB (A)Range controlManual, three gears, linear range > 60dBTesting Range30dB~90dB (dynamic scale display 10dB~100dB)50dB~110dB (dynamic scale display 30dB~120dB)70dB~130dB (dynamic scale display 50dB~140dB)AccuracyIn accordance with IEC61672 standard, class 2Time WeightingFast (F), Slow (S), Impulse (I)DisplayLarge screen dynamic LCD, instantaneous sound level, with analogammeter display.CalibrationUse class 1 sound level calibratorPower Supply4x1.5V AAA Size (UM-4) Battery(not included)External Power6VWeight185g (Not Including Batteries)Dimensions227mmx63mmx26 mmOperating ConditionTemperature: -10~50°CStandard AccessoriesMain UnitWindscreenCarrying Case (B04)ManualOptional Accessories (Extra charge）External power supply (6V)