Features: <br>1. 100% brand new and high quality <br>2. This meter has instantaneous sound measure function. <br>3. The measurement range is 0?130 dB <br>4. It has two equivalent weighted sound pressure levels, A and C. <br>5. Suitable for AC and DC signed output for frequency analyzer level re corder, FFT analyzer, graphic recorder etc. <br> <br>Specification: <br>Condition: 100% Brand New <br>Brand: SMART SENSOR <br>Model: AS824 <br>Accuracy: ±1.5 dB(under reference conditions) <br>Frequency range: 31.5 Hz to 8.5KHz <br>Linearity range: 50dB <br>Measuring level: 30?130dBA,35?130dBC <br>Frequency weighting: A,C <br>Digital display: 5 digits <br>Resolution: 0.1dB <br>Display: 0.5 secretary <br>Bar graph: 50 dB scale at 1 dB step for monitoring current sound pressure level display period: 50 mS <br>Level ranges: 30?80 dB; 50?100dB; 60?110dB; 80?130dB; <br>Over indicate over range: Under indicate less than lower limit of the range. <br>AC output:0.707 Vrms at FS output impendance approx 600Ω <br>DC output:10 mV/dB output impedance approx 100Ω <br>Time weighting: Fast/Slow <br>Microphone: 1/2 inch Electret Condenser microphone <br>Max: Maximum hold <br>Power supply: 9V battery(not included) orDC9V 100mA <br>Self calibration time: 10 sec(every turn on) <br>Operating Temperature: 0℃ to 40℃ <br>Operating Humidity: 10% to 80% RH <br>Storage Temperature: ?10℃ to 60℃ <br>Storage Humidity:10% to 70% RH <br>Weight: Approx. 664g / 23.4oz <br>Size: Approx. 224 * 66 * 33mm / 8.8 * 2.6 * 1.3in <br> <br>Package List: <br>1 * Digital Sound Level Meter <br>1 * Power Supply DC 9V Cable <br> <br> <br>Note: <br>New-style and old-style are shipped randomly<br>1、100% brand new and high quality. <br>2、This meter has instantaneous sound measure function. <br>3、The measurement range is 0-130 dB <br>4、It has two equivalent weighted sound pressure levels, A and C. <br>5、Suitable for AC and DC signed output for frequency analyzer level re corder, FFT analyzer, graphic recorder etc.