This meter is featured with wide measuring range (30-130dB). It's portable and easy to use and handy instrument for sound quality control in factory， office， home， school and construction site.<br> <br> Features:<br> This meter is featured with wide measuring range (30-130dB).<br> A frequency weighting， Fast/Slow response and Maximum hold function.<br> Equipped with sponge ball.<br> Portable， easy to use and handy instrument for sound quality control in factory， office， home， school and construction site.<br> Slow rate to pick up the reading of average within 1 second.<br> <br> Specifications:<br> Frequency Range: 31.5Hz to 8KHz<br> Measuring Range: (30)32-130dB<br> Frequency Weighting: A/C<br> Microphone: 1/2" Polarization Capacitance Microphone<br> Display: 4 Digits LCD Display<br> Resolution: 0.5dB<br> Display Update: 2 Times/sec<br> Time Weighting:<br> FAST: 125ms<br> SLOW: 1 second<br> Measuring Ranges:<br> Range 1: (30)32dB to 70 dB<br> Range 2: 60dB to 100 dB<br> Range 3: 90dB to 130 dB<br> Accuracy: ±2dB(94dB@1kHz)<br> Dynamic Range: 40dB<br> MAX Hold: "MAX"<br> Power Supply: 1 * 9V Battery (model 6F22， NOT included)<br> Operation Environment: 0-40 °C/32-104°F; 10-75%RH<br> Storage Environment: -10-50°C/14-122°F; 10-90%RH<br> Dimension: 185 * 65 * 35mm / 7.28 * 2.56 * 1.38in (L * W * H)<br> Weight: 114g / 4oz<br> Package Size: 20 * 15 * 5.5cm / 7.87 * 5.9 * 2.16in (L * W * H)<br> Package Weight: 379g / 13.38oz<br> <br> Package List:<br> 1 * Sound Level Meter<br> 1 * Sponge Ball<br> 1 * User Manual (English)<br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>