Feature: 1. Accurate Measurement: The measuring range of the sound level meter is 30dB to 130dB. Highly accurate with ± 1.5 dB. Real-time monitoring gives you accurate data on noise in the area. 2. Audible and Visual Alarms: Setting high/low alarm values, if the measured value higher than it, red color alarm back light will light up to alert you it is over the high/low alarm value. 3. Max/Min Measurement: The sound level meter has Max or Min measurement values to represent the maximum/minimum (high/low peak) value of the sound produced within a certain time, and the data hold function can freeze the current reading based on the sound measurement according to individual needs. 4. A Weighted Measurement: The A weighted simulates the frequency characteristics of low-intensity human ear noise, which is suitable for the detection of ambient noise. More professional measurement methods provide users with a more perfect user experience. 5. Digital LCD Display: The digital display is a 4-digit LCD display with a resolution of 0.1 dB. Large backlit LCD digital display, the reading effect is clearer in dark places. When the battery is low, the LCD display will display a low voltage icon, indicating that the power is low at this point and the battery needs to be replaced. Specification: Specifications: Model: TA656A Material: ABS Measurement Range: 30.0~130dBA Resolution: 0.1dB Accuracy: ± 1.5dB (at the reference sound pressure level, 94dB@1kHz) Frequency Weighting: A weighting Noise Display: Four digit display, maximum 1999 Frequency Response: 31.5Hz~8KHz Time Weighting: FAST 0.125 seconds, SLOW 1 second Sampling Rate: 2 times/second Microphone: High sensitivity 1/2-inch capacitive microphone Automatic Shutdown: 15 minutes (can be manually turned off) Usage Environment: -10℃~50℃, maximum relative humidity of 80%, indoor altitude<2000m Storage Environment: -10℃~50℃, maximum relative humidity of 70% (battery removed) Power Supply: 2 * 1.5 AAA (Not included) Display Size: 30 * 30mm Item Size: 160 * 56 * 28mm / 6.3 * 2.2 * 1.1in Item Weight: 114g / 4.02oz Package Weight: 150g / 5.29oz Package Size: 20.5 * 8.5 * 4.5cm / 8.07 * 3.35 * 1.77in Package List: Package List: 1 * Sound Level Meter 1 * Cloth Bag 1 * Packaging Box 1 * User Manual (English)