Feature: 1. High Accurate: The noise meter features a high-sensitivity, high-precision microphone sensor, capable of measuring noise levels from 30 to 130 dB, accuracy: ±1.5dB, resolution: 0.1dB. 2. A-Weighting, Fast/Slow Measurement: A-weighting is to simulate the frequency of low-intensity human ear noise, is it more professional for the detection of environmental noise. The Fast response rate is 125ms for general environmental measurements. Slow response rate of 1s for environmental measurements with relatively large variations in noise levels. 3. Date Hold, Max/Min Measurement: The sound pressure level meter has a Max/Min measurement value, which indicates the High/Low peak value of the sound produced over a certain period of time. The Data Hold function freezes the current reading on top of the sound measurement according to individual needs. 4. Digital LCD Display: High definition energy saving screen, long press the backlight button to turn on a backlight, making it easy to view even in damn light. 5. Wide Application: Mainly used in residential area, construction section, factories, restaurants, entertainment and other various occasions of environmental monitoring, etc. Specification: NF-562 is a professional noise tester with portable size, stable functionality, the device can direct, accurate and fast test the decibel level in any environment; Mainly used in construction field, entertainment venue, living community etc to monitor the noise level of the environment. Features: High Accurate: The noise meter features a high-sensitivity, high-precision microphone sensor, capable of measuring noise levels from 30 to 130 dB, accuracy: ±1.5dB, resolution: 0.1dB. A-Weighting, Fast/Slow Measurement: A-weighting is to simulate the frequency of low-intensity human ear noise, is it more professional for the detection of environmental noise. The Fast response rate is 125ms for general environmental measurements. Slow response rate of 1s for environmental measurements with relatively large variations in noise levels. Date Hold, Max/Min Measurement: The sound pressure level meter has a Max/Min measurement value, which indicates the High/Low peak value of the sound produced over a certain period of time. The Data Hold function freezes the current reading on top of the sound measurement according to individual needs. Digital LCD Display: High definition energy saving screen, long press the backlight button to turn on a backlight, making it easy to view even in damn light. Wide Application: Mainly used in residential area, construction section, factories, restaurants, entertainment and other various occasions of environmental monitoring, etc. Specifications: Model: NF-562 Material: ABS Display: FSTN LCD Screen Button: 4 Function buttons Sensor: Capacity Microphone Noise Testing: Testing Range: 30-130dB Testing Accuracy: ±1.5dB Resolution: 0.1dB Testing Speed: FAST: 125ms SLOW:1s Over Range Alert: Yes MAX/MIN Testing: Yes Auto-Off: 5 minutes without operation Data Store/Backlight: Yes LCD Backlight Control: Yes Low Battery Alert: Yes Battery: 3 * 1.5V AAA batteries (Not included) Item Size: 160 * 50 * 30mm / 6.29 * 1.97 * 1.18in Package Weight: 200g / 7.05oz Package Size: 21 * 10.6 * 4.5cm / 8.26 * 4.17 * 1.77in Package List: 1 * Sound Level Meter 1 * User Manual (English) Package List: Package List: 1 * Sound Level Meter 1 * User Manual (English)