NEEWER® USB Digital Sound Level Meter
Digital Sound Noise Level Meter Decibel Pressure LoggerFeatures:*Two equivalent weighted sound pressure levels, A and C*Max locked function has the maximum value, after the stent-in-one unique, easy to use*Auto power off function*Low battery indicator*Overload prompts*Portable, easy to use and handy*Instantaneous sound measure function*Tripod Mounting optionSpecification:*Sound Level: 40 ~ 130 dB With Level Selecting Button Switches*level 1: 40 ~ 70dB*level 2: 60 ~ 90dB*level 3: 80 ~ 110dB*level 4: 100 ~ 130dB*level 5: 40 ~ 130dB*Accuracy: ?2dB (under reference condition)*Measuring Level: 40~130dBA, 40~130dBC*Frequency Range: 31.5 Hz ~ 8.5 kHz*Linearity/Dynamic Range: 30dB*Frequency weighting: A and C features*Digital LCD: 45 x 35mm with 4 digits, Resolution: 0.1dB, Display: 0.5 secretary*Sampling Rate: 2 times/second*Dynamic Characteristic (Time weighting): FAST (high speed) / SLOW (low speed)*1 bar graph represents 1dB in the Analog Bar Graph*Bar Graph: 50dB scale at 1dB step for monitoring current sound pressure level display period of 50mS*Level Ranges: 40 ~ 70dB, 60 ~ 90dB, 80 ~ 110dB, 100 ~ 130dB, 40 ~ 130dB*Load indication: Use the symbol OVER (indicating over range) and UNDER (indicating less than lower limit of the range)*AC output: 0.707 Vrms at FS output impedance approx. 600?*Microphone: 1/2 inch electret condenser microphone*Maximum Hold*Power Supply: 6F22 9V alkaline cells/battery or DC 9V 100mAPackage Contents:1 x Sound Level Meter1 x Sponge Ball