This product is an utility tool for you to use in your daily life, you can use it to detect the noise for you, the response speed can be adjusted and it is also portable for you to carry it, come on and try it, it will not let you down.   Features: Polarized capacitor microphone provide fine performance for precision noise measurement apacitive test.  It is the professional noise measurement which can detect 30dB~130dB noise and with 2 response speed mode for you to choose.  Real-time measurement and quick response: Indoor and outdoor environmental noise sampling frequency quick response is 0.125 seconds/time and slow response is 1 second/time.  A/C dual weight measurement: A weighting can simulate the frequency characteristics of low-intensity noise of the human ear, suitable for environmental noise detection, and C weighting Simulate the characteristics of high-intensity noise, suitable Sound pressure analysisof machine engines.  Easy to carry design: Exquisite shape design easy to fit in your pocket Make noise measurement easier.  Backlight display: The default backlight is long on when starting up Clear reading/no parallax.  Long press the MAX button for one second during measurement Lock the maximum measured value.  Suitable for environmental sound detection sound insulation detection/ industrial noise detection Sound detection such as electrical sound detection.   Specifications: Main material: ABS;  Power su-pply mode: 2 * AAA battery (not included);  Noise accuracy±2.0dB (reference sound pressure standard 94dBat1KHz);  Frequency response: 31.5Hz-8KHz;  Dynamic Range: 50dB;  Measuring range: 30-130dB;  Digital display: 4-digit LCD display, resolution 0.1dB;  Dynami characteristics: FAS-T, SLOW reaction speed;  Working temperature and humidity: 0~+40℃, 10-70%RH;  Storage temperature and humidity: -10-+60℃, 10-70%RH;  Item size: 195 * 42 * 22mm / 7.7 * 1.7 * 0.7in;  Item weight: 120g / 4.5ounce;  Package size: 230 * 80 * 50mm / 9.1 * 3.1 * 2.0in;  Package weight: 147g / 5.2ounce;   Packing list: 1 * Noise Detector