Sound Level Meter Real Time Monitoring Portable Noise Tester Decibel Tester for Factory Traffic Item Type: Sound Level Meter Material: ABS Frequency Weighted Characteristic: A weighted Frequency Response: 31.5HZ to 8KHZ Measurement Range: 30dB to 130dB Response Time: (FAST) 125 milliseconds (SL0W) 1000 milliseconds less than 30dB Overload Indication: Greater than 130dB Accuracy: ± 1.5dB Automatic Shutdown: About 10 minutes Low Voltage Prompt: The battery voltage is below 6V Sensor: 1/2 inch electret condenser microphone Power Supply: 9V 6F22 battery x 1 (shipped without battery) Size: Approx. 192 x 53.8 x 35mm / 7.56 x 2.12 x 1.38in  Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store