Description :<br>WS1361 Digital Sound Pressure Tester Level Meter Decibel Noise (SD record type)<br>This equipment has been designed to meet the measurement requirement of safety engineers， health， industrial environment， which include factory， traffic， family baby's living room， wind farms， sports stadium， airport， urban， city noises and audio system.<br>It is an advance environmental noise monitoring system， monitors environment noise from a singal station to a mutiple stations.<br>features :<br>Conformed to the iec651 type2 and ansis1.4 type 2 standardsAccuracy : &amp;plusmn;1.5dbMeasuring range : 30-130dba or 35-130dbcFrequency weighting : A and CTime weighting : fast &amp;amp; slowAc and dc output for frequency analyzer level recorder， fft analyzer， graphic， graphic recorder etc.The meter can be connected pc with usb.<br>Notice :Below 2000 meter in heightOperating condition : 0\u2103~40\u2103， 10~80%rhUse dry cloth to clean the unit， but never with any solvent.<br>specification :<br>Frequency range : 3.5hz~8.5khzLevel range : 30~80db， 40~90db， 50~100db， 60~110db， 70~120db， 80~130db， 30~130dbLinearity weighting : 50dbFrequency weighting : a\/cDigital display : 4 digitsResolution : 0.1dbSample rate : 2times\/secondBar graph : 50db scale 1db step for monitoring current sound pressure level display sample rate : 20 times\/secondOver indication : over\/underAc output : 0.707vrms at fs output impedance approx 600ohmDc output : 10mv\/db， output impedance approx 100ohmTime weight : fast\/slowMicrophone : &amp;frac12; inch electret condenser microphonePower life : about 30 hours(alkaline battery)Self calibration : 4sOperating condition : 0\u2103~40\u2103， 10~80%rhStorage condition : -10~50\u2103， 10~80%rh<br>Package included :<br>1 x Professional sound level meter1 x Sponge ball1 x Usb cable1 x SD card1 x Software cd1 x English user manual<br>Details pictures :