Designed to deliver high performance， the Smart Sensor AS824 Digital Sound Level Meter measures ambient sound level ranging 30dB to 130dB with frequency range of 31.5Hz to 8.5KHz. The 1/2" condenser microphone is sensitive enough to offer high precision measurement. Meanwhile， auto LCD backlit ensures a clear， recognizable display even in the dark. V-shaped ergonomic design enhances the grip. And it is incredibly easy to operate. Don’t hesitate to get one! It surely is worth your investment!                                    Features             Factory calibrated， designed to deliver high performance<br> Measure ambient sound level ranging 30dB to 130dB with frequency range of 31.5Hz to 8.5KHz<br> 1/2" condenser microphone is sensitive enough to offer high precision measurement<br> Auto LCD backlit ensures a clear， recognizable display even in the dark<br> V-shaped ergonomic design enhances the grip<br> Powered by battery， incredibly easy to operate <br>                                                            Specifications             Model     AS824    <br> Accuracy     ±1.5dB    <br> Frequency Response     31.5Hz - 8.5KHz    <br> Dynamic Range     50dB    <br> Measurement Range     30 - 130dBA， 35 - 130dBC    <br> Resolution     0.1dB    <br> Gear Measuring     30 - 80dB， 50 - 100dB， 80 - 130dB， 30 - 130dB    <br> Microphone     1/2" Condenser Microphone    <br> Working Temperature and Humidity     0 - 40℃， 10 - 80%RH    <br> Storage Temperature and Humidity     -10 - 60℃， 10 - 70%RH    <br> Dimensions     (8.86 x 2.52 x 1.18)" / (22.5 x 6.4 x 3)cm (L x W x H)    <br> Color     Gray    <br> Weight     7.05oz / 200g     <br>                                                             Package Includes            1 x Digital Sound Level Meter<br>1 x Certificate of Calibration<br>1 x Manual<br>1 x Portable Bag<br>1 x AC/ DC Output Line<br>