Please note the RICHMETERS RM062 is same as FUYI brand FY826, if the RM062 is out of stock, we will send FY826 digital sound level meter Specifacation: Frequency weighting A-Weighted Frequency sensing range 31.5Hz-8KHz Sound level range 30dB-130dB Sound level resolution 0.1dB Fast mode sampling time Every 125ms Slow mode sampling time Every 1000ms Less than 30dB overload indication UN icon Over 130dB overload indication OL icon Automatic Shut-down 10 minutes of inactivity Low Battery Icon Less than 6V Display Backlight LCD Measurement mode FAST mode / SLOW mode Power "9V" battery(Not included) Operation temperature and humidity 0~40/32~104 45%-80%RH Certifications CE / ROHS / FCC Dimensions 192mm*53.8mm*35mm Weight Around 169g Noise measurement range:30~130dB Noise accuracy:1.5dB(reference sound pressure level,94dB@1kHz) Frequency response:31.5Hz~8kHz Time weighting (F/S switching): FAST:use 125ms time constant(default use) SLOW:use 1 second time constant(used when the tone value changes greatly) Frequency weighting characteristics:A characteristic(A weight) Digital display:4-digit LCD display Resolution:0.1dB Data retention:have MAX/MIN:YES(large and small value measurements) Flashlight:YES(In the back) Analog bar:YES Low battery indicator:YES Cancel shut off:YES Use battery:1*9V (not include) Working temperature and humidity :0~40C/10%-80% RH Storage temperature and humidity:10~60C/10~70RH Dimensions:192*53.8*35mm Packing List FY826 Sound Meter x 1 Maual x 1 battery not included Tripod Bracket not included