Check the listing for details. Sound Level Meter 1356. Condition: New. Listed at 120.00 USD. This unit has been designed to meet the measurement requirement of noise engineers, noise quality control and health prevention in various environments, such as noise measurement in factory, office, traffic road, family and all other noise measurement applications. Sound Level Meter possesses the following features: unit was designed according to following standards: a. International electrician committee standard: IEC PUB 651 TYPE2 b. US national standard: ANSI S1.4 TYPE2 acy up to +/-1.5dB rement range is 30 to 130dB Slow Time weigting selection atic backlight maximum value holding function power off 10 minutes 8.A/C Frequency weighting selection AC and PWM signal output are available dar function 11.4700 data record function ct with the PC through USB, provides data record downloading, real-time data sampling analysis, and printing graph&data functions. Calibration sound source 94dB@1KHz Measurement range 30~130dBA、35~130dBC Accuracy ±1.5dB（reference sound pressure standard，94dB@1KHz） Frequency response 31.5Hz~8.5KHz Resolution 0.1dB Measuring level 30 to 80 , 50 to 100, 60 to 110, 80 to 130, 30 to 130 Dynamic range 50dB/100dB Overload indication OVER / UNDER Frequency weighting characteristic A and C Digital display 4 digits Analogy bar graph 1dB/1 bar graph Sampling rate FAST:8times/second;SLOW:2times/second AC signal output 4Vrms/ full bar graph, output impedance is about 600 ohm PWM signal output Duty cycle =0.01X db value/3.3 x 100% Dyna mic cha racteristic FAST(high speed)/SLOW(low speed) Calendar accuracy ±30seconds/day Data stor age quantity 4700 The m aximum value holding MAX Auto power off 10 minutes without operation Micro phone 1/2inch polarization capacitance microphone Power supply 6V (4PCS 1.5V Alkline battery) Dimension 70x35x256mm Weight 244G (Without battery) Battery life 20h continuous use(Alkaline batteries) Color box*1Host*1Instructions*1PP box*1Audio Line*1CD*1USB*1