This meter is featured with wide measuring range (30-130dB). It's portable and easy to use and handy instrument for sound quality control in factory， office， home， school and construction site.Features:Wide measuring range: 30-130dB.Fast/Slow response and Maximum hold function.Equipped with sponge ball.Auto power-off after working 2 minutes(power on normally); if you press the switch button for 3s， it will not power off unless you press the button again.AC/DC analog signal output.Power supply: USB interface or 4 * AA batteries.Portable， easy to use and handy instrument for sound quality control in factory， office， home， school and construction site.Specifications:Measuring Range: 30-130dBA or 35-130dBCAccuracy: ÷1.5dBResolution: 0.1dBFrequency Range: 31.5Hz to 8.5KHzLevel Range: 30~80dB， 40~90dB， 50~100dB， 60~110dB， 70~120dB， 80~130dB， 30~130dBLinearity Weighting: 50dBFrequency Weighting: A/C Digital Display: 4 DigitsSample Rate: 2 Times/secMAX Hold: "MAX"Over Indication: OVER/UNDERTime Weight: FAST/SLOWMicrophone: 1/2inch Electret Condenser MicrophonePower Supply: 4 * 1.5V AA Batteries(not included) or USB 5V 100mAOperation Environment: 0-40 10-80%RHStorage Environment: -10-50 10-80%RHDimension: 230 * 70 * 35mm / 9 * 2.75 * 1.38in (L * W * H)Weight: 269g / 9.48ozPackage Size: 29 * 14 * 6.5cm / 11.4 * 5.5 * 2.56in (L * W * H)Package Weight: 459g / 16.19ozPackage List:1 * Sound Level Meter1 * Sponge Ball1 * USB Cable1 * CD1 * User Manual (English)
