Large Measuring Range: The sound level meter has a wide measurement range of 30 to 130 dB, with A, C, and Z frequency weighting and FAST and SLOW time-weighted options to meet various measurement requirements Real-Time PC Connection: Use the USB cable to connect the sound level meter to a computer, and use the software to download measurement data to your computer for analysis and storage, compatible with Windows 7, 8, 10, and 11 (with 64 bits OS) Comprehensive Parameter Settings: You can adjust the record interval, upper and lower limit, auto power-off, and more according to your needs Large LCD Display: With colored LCD and analog bar scale display, the sound level meter provides a clear display of measurement results. The LCD screen can display the maximum, minimum, or average value of sound level readings over a specified time period Datalogger with Dual Alarm: record up to 1999 groups of data with buzzer and light alarm when exceeds the set threshold Handheld Sound Level Meter A/C/Z Datalogger