USB Digital Sound Level Meter from 40dB to 130 dB SL-814

Digital Sound Noise Level Meter Decibel Pressure Logger
Features:
*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 option

Specification:
*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 100mA

Package Contents:
1 x Sound Level Meter
1 x Sponge Ball