Feature: 1. Decibel Meter with AC Weighing: The decibel meter uses a accurate capacitive microphone to catch sound, with A/C weighting, with a measurement range of 30‑130dB and a frequency response range of 31.5‑8.5KHz. 2. Backlit LCD: The noise level measured by this sound level meter is expressed in dB and displayed on the LCD screen. The large screen is easy to read. Supports white backlight, easy to view even in low light conditions. 3. Product Functions: This digital SPL meter has a maximum or minimum measurement value to represent the maximum or minimum value of sound generated within a certain period of time, with data hold function, convenient and practical. 4. Applicable Scenario: This sound level meter can measure noise levels ranging from 30 to 130 dB, making it very suitable for noise levels in households, communities, cars, workshops, schools, offices, and factories. 5. Convenient to Use: This portable noise meter has non slip side for easy grip. Powered by 3 AAA batteries (not included), convenient for use at any time. Equipped with automatic shutdown and low battery indicator, extending service life. Specification: Item Type: Sound Level Meter Material: PC Power Supply: 3 x AAA Battery (not included) Applicable Standard: IEC651 Type 2, ANSISI.4 Type 2 Calibration Sound Source: 94dB at 1kHz Measurement Range: 30-130dBA Accuracy: +1.5dB (Reference 94dB at 1kHz) Frequency Response: 31.5-8.5kHz Resolution: 0.1dB Frequency Weighting: A/C Analog Bar Graph: 2dB/1 bar graph Display Update Time: 2 times/s (FAST), 1 time/s (SLOW) Sampling Rate: FAST(125ms), SLOW(1s) Product Features: Sound Level Range: 30 to 130dB (auto calibration) Frequency Weighting: A/C Fast or Slow Time Weighting Selection Maximum Hold Function High Accuracy Bar Graph Display Low Battery Alert White Backlight Over and Under Indication Time and Date Display Auto Power Off Function Setting . Package List: 1 x Sound Level Meter 1 x Storage Bag 1 x User Manual