Item Type: Sound Level MeterMaterial: ABSColor: BlackMeasuring Range: 30-130dBAAccuracy: 1.5dBAccuracy: 1.5dB (at the reference sound pressure level, 94dB at 1kHz )Resolution: 0.1dBEnvironment Temperature Range: 0 to 60Temperature Accuracy: 2Noise Display: Four digit display, maximum 1999Frequency Response: 125Hz to 8kHzAnalog Bar: 1 scale represents 2dBOverload: OVER, Hi, UNDER, LOMicrophone: Highly sensitive 1/2 inch condenser microphoneTime Weight: FAST 0.125 seconds, SLOW 1 secondSampling Rate: 2 times/secondAutomatic Shutdown: 10 minutes (can be closed manually)Operating Environment: - 10 to 50, maximum 80% relative humidity, indoor altitude less than Approx. 2000m / 6561.7ftStorage Environment: - 10 to 50, maximum 70% relative humidity (take out the battery)Display Size: Approx. 37 x 41mm / 1.46 x 1.61in Power Supply: 1. 5V AAA battery x 3 (without battery) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1SENSITIVE DETECTION: The noise meter is equipped with high accuracy sensor and sensitive 1/2in condenser microphone, which features fast instantaneous response! 2THRESHOLD VALUE ADJUSTABLE: Upper and lower alarm thresholds can be set, you can make adjustments according to your actual needs. 3RED LIGHT ALARM: When the measurement is higher or lower than the set threshold value, the red background light on the screen lights up and the measurement value flashes to indicate the alarm. 4BACKLIT LCD SCREEN: With a backlit LCD screen, the meter is very convenient to work at night or in any dark place. 5EASY CARRYING: Comes with small size and lightweight, you can easily take the noise meter with you to help with your work.